S&P 500 PE Ratio — Monthly (1920–present)
Latest
26.36
2026-09-04 (estimate)
Median
16.52
full series
80th percentile
22.14
overvaluation band
20th percentile
10.42
undervaluation band
Max
123.73
2009-05-01
Min
5.82
1949-06-01
Chart
Note: the PE ratio exceeded 100 during 2009 due to the earnings collapse in the financial
crisis; the axis is not truncated. The shaded band spans the 20th–80th percentile of the
full 1920–present series.
Monthly data
| Month | PE ratio | Flag |
|---|---|---|
| 2026-09-04 | 26.36 | estimate |
| 2026-09-01 | 26.04 | estimate |
| 2026-08-01 | 26.11 | estimate |
| 2026-07-01 | 25.33 | estimate |
| 2026-06-01 | 25.22 | |
| 2026-05-01 | 26.09 | |
| 2026-04-01 | 25.49 | |
| 2026-03-01 | 25.43 | |
| 2026-02-01 | 27.07 | |
| 2026-01-01 | 27.98 | |
| 2025-12-01 | 28.48 | |
| 2025-11-01 | 28.22 | |
| 2025-10-01 | 28.42 | |
| 2025-09-01 | 28.13 | |
| 2025-08-01 | 27.84 | |
| 2025-07-01 | 27.81 | |
| 2025-06-01 | 27.10 | |
| 2025-05-01 | 26.34 | |
| 2025-04-01 | 24.56 | |
| 2025-03-01 | 26.23 | |
| 2025-02-01 | 28.15 | |
| 2025-01-01 | 28.16 | |
| 2024-12-01 | 28.60 | |
| 2024-11-01 | 28.66 | |
| 2024-10-01 | 28.45 | |
| 2024-09-01 | 28.09 | |
| 2024-08-01 | 27.67 | |
| 2024-07-01 | 28.08 | |
| 2024-06-01 | 27.64 | |
| 2024-05-01 | 26.93 | |
| 2024-04-01 | 26.41 | |
| 2024-03-01 | 27.02 | |
| 2024-02-01 | 26.14 | |
| 2024-01-01 | 25.01 | |
| 2023-12-01 | 24.35 | |
| 2023-11-01 | 23.51 | |
| 2023-10-01 | 22.78 | |
| 2023-09-01 | 23.93 | |
| 2023-08-01 | 24.16 | |
| 2023-07-01 | 24.76 | |
| 2023-06-01 | 24.01 | |
| 2023-05-01 | 23.15 | |
| 2023-04-01 | 23.27 | |
| 2023-03-01 | 22.66 | |
| 2023-02-01 | 23.40 | |
| 2023-01-01 | 22.82 | |
| 2022-12-01 | 22.65 | |
| 2022-11-01 | 22.07 | |
| 2022-10-01 | 20.44 | |
| 2022-09-01 | 20.58 | |
| 2022-08-01 | 22.03 | |
| 2022-07-01 | 20.53 | |
| 2022-06-01 | 20.28 | |
| 2022-05-01 | 20.81 | |
| 2022-04-01 | 22.40 | |
| 2022-03-01 | 22.19 | |
| 2022-02-01 | 22.42 | |
| 2022-01-01 | 23.11 | |
| 2021-12-01 | 23.63 | |
| 2021-11-01 | 24.52 | |
| 2021-10-01 | 24.39 | |
| 2021-09-01 | 25.35 | |
| 2021-08-01 | 26.23 | |
| 2021-07-01 | 26.56 | |
| 2021-06-01 | 26.70 | |
| 2021-05-01 | 28.05 | |
| 2021-04-01 | 29.92 | |
| 2021-03-01 | 30.50 | |
| 2021-02-01 | 33.24 | |
| 2021-01-01 | 35.96 | |
| 2020-12-01 | 39.26 | |
| 2020-11-01 | 37.16 | |
| 2020-10-01 | 35.30 | |
| 2020-09-01 | 34.27 | |
| 2020-08-01 | 34.41 | |
| 2020-07-01 | 32.44 | |
| 2020-06-01 | 31.29 | |
| 2020-05-01 | 27.82 | |
| 2020-04-01 | 24.97 | |
| 2020-03-01 | 22.80 | |
| 2020-02-01 | 26.42 | |
| 2020-01-01 | 24.88 | |
| 2019-12-01 | 22.78 | |
| 2019-11-01 | 22.62 | |
| 2019-10-01 | 22.04 | |
| 2019-09-01 | 22.44 | |
| 2019-08-01 | 21.67 | |
| 2019-07-01 | 22.28 | |
| 2019-06-01 | 21.37 | |
| 2019-05-01 | 21.15 | |
| 2019-04-01 | 21.56 | |
| 2019-03-01 | 20.86 | |
| 2019-02-01 | 20.60 | |
| 2019-01-01 | 19.60 | |
| 2018-12-01 | 19.39 | |
| 2018-11-01 | 20.67 | |
| 2018-10-01 | 21.25 | |
| 2018-09-01 | 22.25 | |
| 2018-08-01 | 22.37 | |
| 2018-07-01 | 22.33 | |
| 2018-06-01 | 22.49 | |
| 2018-05-01 | 22.49 | |
| 2018-04-01 | 22.53 | |
| 2018-03-01 | 23.41 | |
| 2018-02-01 | 23.82 | |
| 2018-01-01 | 24.97 | |
| 2017-12-01 | 24.25 | |
| 2017-11-01 | 23.81 | |
| 2017-10-01 | 23.67 | |
| 2017-09-01 | 23.28 | |
| 2017-08-01 | 23.16 | |
| 2017-07-01 | 23.36 | |
| 2017-06-01 | 23.40 | |
| 2017-05-01 | 23.31 | |
| 2017-04-01 | 23.24 | |
| 2017-03-01 | 23.60 | |
| 2017-02-01 | 23.68 | |
| 2017-01-01 | 23.59 | |
| 2016-12-01 | 23.76 | |
| 2016-11-01 | 23.35 | |
| 2016-10-01 | 23.57 | |
| 2016-09-01 | 24.22 | |
| 2016-08-01 | 24.57 | |
| 2016-07-01 | 24.52 | |
| 2016-06-01 | 23.97 | |
| 2016-05-01 | 23.81 | |
| 2016-04-01 | 23.97 | |
| 2016-03-01 | 23.39 | |
| 2016-02-01 | 22.02 | |
| 2016-01-01 | 22.18 | |
| 2015-12-01 | 23.74 | |
| 2015-11-01 | 23.67 | |
| 2015-10-01 | 22.68 | |
| 2015-09-01 | 21.45 | |
| 2015-08-01 | 22.15 | |
| 2015-07-01 | 22.40 | |
| 2015-06-01 | 22.12 | |
| 2015-05-01 | 21.92 | |
| 2015-04-01 | 21.42 | |
| 2015-03-01 | 20.96 | |
| 2015-02-01 | 20.77 | |
| 2015-01-01 | 20.02 | |
| 2014-12-01 | 20.08 | |
| 2014-11-01 | 19.75 | |
| 2014-10-01 | 18.50 | |
| 2014-09-01 | 18.81 | |
| 2014-08-01 | 18.68 | |
| 2014-07-01 | 18.96 | |
| 2014-06-01 | 18.88 | |
| 2014-05-01 | 18.46 | |
| 2014-04-01 | 18.35 | |
| 2014-03-01 | 18.48 | |
| 2014-02-01 | 18.06 | |
| 2014-01-01 | 18.15 | |
| 2013-12-01 | 18.04 | |
| 2013-11-01 | 18.15 | |
| 2013-10-01 | 17.86 | |
| 2013-09-01 | 17.88 | |
| 2013-08-01 | 17.91 | |
| 2013-07-01 | 18.12 | |
| 2013-06-01 | 17.80 | |
| 2013-05-01 | 18.25 | |
| 2013-04-01 | 17.69 | |
| 2013-03-01 | 17.68 | |
| 2013-02-01 | 17.32 | |
| 2013-01-01 | 17.03 | |
| 2012-12-01 | 16.44 | |
| 2012-11-01 | 16.12 | |
| 2012-10-01 | 16.62 | |
| 2012-09-01 | 16.69 | |
| 2012-08-01 | 16.14 | |
| 2012-07-01 | 15.55 | |
| 2012-06-01 | 15.05 | |
| 2012-05-01 | 15.22 | |
| 2012-04-01 | 15.70 | |
| 2012-03-01 | 15.69 | |
| 2012-02-01 | 15.37 | |
| 2012-01-01 | 14.87 | |
| 2011-12-01 | 14.30 | |
| 2011-11-01 | 14.10 | |
| 2011-10-01 | 13.88 | |
| 2011-09-01 | 13.50 | |
| 2011-08-01 | 13.79 | |
| 2011-07-01 | 15.61 | |
| 2011-06-01 | 15.35 | |
| 2011-05-01 | 16.12 | |
| 2011-04-01 | 16.21 | |
| 2011-03-01 | 16.04 | |
| 2011-02-01 | 16.52 | |
| 2011-01-01 | 16.30 | |
| 2010-12-01 | 16.05 | |
| 2010-11-01 | 15.88 | |
| 2010-10-01 | 15.90 | |
| 2010-09-01 | 15.61 | |
| 2010-08-01 | 15.47 | |
| 2010-07-01 | 15.72 | |
| 2010-06-01 | 16.15 | |
| 2010-05-01 | 17.30 | |
| 2010-04-01 | 19.01 | |
| 2010-03-01 | 18.91 | |
| 2010-02-01 | 18.91 | |
| 2010-01-01 | 20.70 | |
| 2009-12-01 | 21.78 | |
| 2009-11-01 | 28.51 | |
| 2009-10-01 | 42.12 | |
| 2009-09-01 | 83.30 | |
| 2009-08-01 | 92.95 | |
| 2009-07-01 | 101.87 | |
| 2009-06-01 | 123.32 | |
| 2009-05-01 | 123.73 | |
| 2009-04-01 | 119.85 | |
| 2009-03-01 | 110.37 | |
| 2009-02-01 | 84.46 | |
| 2009-01-01 | 70.91 | |
| 2008-12-01 | 58.98 | |
| 2008-11-01 | 34.99 | |
| 2008-10-01 | 27.22 | |
| 2008-09-01 | 26.48 | |
| 2008-08-01 | 26.83 | |
| 2008-07-01 | 25.37 | |
| 2008-06-01 | 26.11 | |
| 2008-05-01 | 25.81 | |
| 2008-04-01 | 23.88 | |
| 2008-03-01 | 21.81 | |
| 2008-02-01 | 21.74 | |
| 2008-01-01 | 21.46 | |
| 2007-12-01 | 22.35 | |
| 2007-11-01 | 20.81 | |
| 2007-10-01 | 20.68 | |
| 2007-09-01 | 19.05 | |
| 2007-08-01 | 18.02 | |
| 2007-07-01 | 18.36 | |
| 2007-06-01 | 17.83 | |
| 2007-05-01 | 17.92 | |
| 2007-04-01 | 17.48 | |
| 2007-03-01 | 16.92 | |
| 2007-02-01 | 17.49 | |
| 2007-01-01 | 17.36 | |
| 2006-12-01 | 17.38 | |
| 2006-11-01 | 17.24 | |
| 2006-10-01 | 17.14 | |
| 2006-09-01 | 16.77 | |
| 2006-08-01 | 16.67 | |
| 2006-07-01 | 16.61 | |
| 2006-06-01 | 16.82 | |
| 2006-05-01 | 17.46 | |
| 2006-04-01 | 17.77 | |
| 2006-03-01 | 17.80 | |
| 2006-02-01 | 17.80 | |
| 2006-01-01 | 18.07 | |
| 2005-12-01 | 18.07 | |
| 2005-11-01 | 18.01 | |
| 2005-10-01 | 17.64 | |
| 2005-09-01 | 18.44 | |
| 2005-08-01 | 18.72 | |
| 2005-07-01 | 19.00 | |
| 2005-06-01 | 19.00 | |
| 2005-05-01 | 18.93 | |
| 2005-04-01 | 19.02 | |
| 2005-03-01 | 19.84 | |
| 2005-02-01 | 20.11 | |
| 2005-01-01 | 19.99 | |
| 2004-12-01 | 20.48 | |
| 2004-11-01 | 20.05 | |
| 2004-10-01 | 19.25 | |
| 2004-09-01 | 19.35 | |
| 2004-08-01 | 19.03 | |
| 2004-07-01 | 19.51 | |
| 2004-06-01 | 20.17 | |
| 2004-05-01 | 20.14 | |
| 2004-04-01 | 21.23 | |
| 2004-03-01 | 21.61 | |
| 2004-02-01 | 22.46 | |
| 2004-01-01 | 22.73 | |
| 2003-12-01 | 22.17 | |
| 2003-11-01 | 23.15 | |
| 2003-10-01 | 24.75 | |
| 2003-09-01 | 26.42 | |
| 2003-08-01 | 26.57 | |
| 2003-07-01 | 27.65 | |
| 2003-06-01 | 28.60 | |
| 2003-05-01 | 28.24 | |
| 2003-04-01 | 28.05 | |
| 2003-03-01 | 27.92 | |
| 2003-02-01 | 28.46 | |
| 2003-01-01 | 31.43 | |
| 2002-12-01 | 32.59 | |
| 2002-11-01 | 32.03 | |
| 2002-10-01 | 29.24 | |
| 2002-09-01 | 28.89 | |
| 2002-08-01 | 31.53 | |
| 2002-07-01 | 32.46 | |
| 2002-06-01 | 37.92 | |
| 2002-05-01 | 41.41 | |
| 2002-04-01 | 43.81 | |
| 2002-03-01 | 46.71 | |
| 2002-02-01 | 44.57 | |
| 2002-01-01 | 46.17 | |
| 2001-12-01 | 46.37 | |
| 2001-11-01 | 43.62 | |
| 2001-10-01 | 39.72 | |
| 2001-09-01 | 36.90 | |
| 2001-08-01 | 37.85 | |
| 2001-07-01 | 35.46 | |
| 2001-06-01 | 33.67 | |
| 2001-05-01 | 32.02 | |
| 2001-04-01 | 27.96 | |
| 2001-03-01 | 26.10 | |
| 2001-02-01 | 27.81 | |
| 2001-01-01 | 27.55 | |
| 2000-12-01 | 26.62 | |
| 2000-11-01 | 26.90 | |
| 2000-10-01 | 26.50 | |
| 2000-09-01 | 27.34 | |
| 2000-08-01 | 27.97 | |
| 2000-07-01 | 28.05 | |
| 2000-06-01 | 28.16 | |
| 2000-05-01 | 27.49 | |
| 2000-04-01 | 28.50 | |
| 2000-03-01 | 28.31 | |
| 2000-02-01 | 27.76 | |
| 2000-01-01 | 29.04 | |
| 1999-12-01 | 29.66 | |
| 1999-11-01 | 29.74 | |
| 1999-10-01 | 28.66 | |
| 1999-09-01 | 29.99 | |
| 1999-08-01 | 30.89 | |
| 1999-07-01 | 32.88 | |
| 1999-06-01 | 32.24 | |
| 1999-05-01 | 33.19 | |
| 1999-04-01 | 34.00 | |
| 1999-03-01 | 33.39 | |
| 1999-02-01 | 32.67 | |
| 1999-01-01 | 32.92 | |
| 1998-12-01 | 31.56 | |
| 1998-11-01 | 30.25 | |
| 1998-10-01 | 27.20 | |
| 1998-09-01 | 26.80 | |
| 1998-08-01 | 28.00 | |
| 1998-07-01 | 29.90 | |
| 1998-06-01 | 28.44 | |
| 1998-05-01 | 28.30 | |
| 1998-04-01 | 28.26 | |
| 1998-03-01 | 27.23 | |
| 1998-02-01 | 25.85 | |
| 1998-01-01 | 24.29 | |
| 1997-12-01 | 24.23 | |
| 1997-11-01 | 23.46 | |
| 1997-10-01 | 23.58 | |
| 1997-09-01 | 23.06 | |
| 1997-08-01 | 22.83 | |
| 1997-07-01 | 22.80 | |
| 1997-06-01 | 21.61 | |
| 1997-05-01 | 20.60 | |
| 1997-04-01 | 18.94 | |
| 1997-03-01 | 19.69 | |
| 1997-02-01 | 20.09 | |
| 1997-01-01 | 19.53 | |
| 1996-12-01 | 19.19 | |
| 1996-11-01 | 19.45 | |
| 1996-10-01 | 19.00 | |
| 1996-09-01 | 18.75 | |
| 1996-08-01 | 18.60 | |
| 1996-07-01 | 18.26 | |
| 1996-06-01 | 19.15 | |
| 1996-05-01 | 19.10 | |
| 1996-04-01 | 18.85 | |
| 1996-03-01 | 19.01 | |
| 1996-02-01 | 19.10 | |
| 1996-01-01 | 18.08 | |
| 1995-12-01 | 18.10 | |
| 1995-11-01 | 17.33 | |
| 1995-10-01 | 16.76 | |
| 1995-09-01 | 16.45 | |
| 1995-08-01 | 16.01 | |
| 1995-07-01 | 16.07 | |
| 1995-06-01 | 15.67 | |
| 1995-05-01 | 15.50 | |
| 1995-04-01 | 15.31 | |
| 1995-03-01 | 15.15 | |
| 1995-02-01 | 15.11 | |
| 1995-01-01 | 14.89 | |
| 1994-12-01 | 14.88 | |
| 1994-11-01 | 15.62 | |
| 1994-10-01 | 16.32 | |
| 1994-09-01 | 17.09 | |
| 1994-08-01 | 17.44 | |
| 1994-07-01 | 17.42 | |
| 1994-06-01 | 18.05 | |
| 1994-05-01 | 18.50 | |
| 1994-04-01 | 19.00 | |
| 1994-03-01 | 20.42 | |
| 1994-02-01 | 21.02 | |
| 1994-01-01 | 21.34 | |
| 1993-12-01 | 21.29 | |
| 1993-11-01 | 21.63 | |
| 1993-10-01 | 22.19 | |
| 1993-09-01 | 22.50 | |
| 1993-08-01 | 22.65 | |
| 1993-07-01 | 22.72 | |
| 1993-06-01 | 23.18 | |
| 1993-05-01 | 22.83 | |
| 1993-04-01 | 22.53 | |
| 1993-03-01 | 22.69 | |
| 1993-02-01 | 22.55 | |
| 1993-01-01 | 22.50 | |
| 1992-12-01 | 22.82 | |
| 1992-11-01 | 22.56 | |
| 1992-10-01 | 22.43 | |
| 1992-09-01 | 23.20 | |
| 1992-08-01 | 23.60 | |
| 1992-07-01 | 23.88 | |
| 1992-06-01 | 23.95 | |
| 1992-05-01 | 24.75 | |
| 1992-04-01 | 24.73 | |
| 1992-03-01 | 25.16 | |
| 1992-02-01 | 25.60 | |
| 1992-01-01 | 25.93 | |
| 1991-12-01 | 24.33 | |
| 1991-11-01 | 23.27 | |
| 1991-10-01 | 22.49 | |
| 1991-09-01 | 21.73 | |
| 1991-08-01 | 21.22 | |
| 1991-07-01 | 20.14 | |
| 1991-06-01 | 19.49 | |
| 1991-05-01 | 18.98 | |
| 1991-04-01 | 18.58 | |
| 1991-03-01 | 17.78 | |
| 1991-02-01 | 17.19 | |
| 1991-01-01 | 15.35 | |
| 1990-12-01 | 15.41 | |
| 1990-11-01 | 14.68 | |
| 1990-10-01 | 14.21 | |
| 1990-09-01 | 14.51 | |
| 1990-08-01 | 15.33 | |
| 1990-07-01 | 16.81 | |
| 1990-06-01 | 16.95 | |
| 1990-05-01 | 16.37 | |
| 1990-04-01 | 15.70 | |
| 1990-03-01 | 15.62 | |
| 1990-02-01 | 14.97 | |
| 1990-01-01 | 15.13 | |
| 1989-12-01 | 15.24 | |
| 1989-11-01 | 14.70 | |
| 1989-10-01 | 14.84 | |
| 1989-09-01 | 14.66 | |
| 1989-08-01 | 14.32 | |
| 1989-07-01 | 13.43 | |
| 1989-06-01 | 12.84 | |
| 1989-05-01 | 12.49 | |
| 1989-04-01 | 12.07 | |
| 1989-03-01 | 11.73 | |
| 1989-02-01 | 11.97 | |
| 1989-01-01 | 11.82 | |
| 1988-12-01 | 11.64 | |
| 1988-11-01 | 11.57 | |
| 1988-10-01 | 12.02 | |
| 1988-09-01 | 11.79 | |
| 1988-08-01 | 11.78 | |
| 1988-07-01 | 12.22 | |
| 1988-06-01 | 12.49 | |
| 1988-05-01 | 12.41 | |
| 1988-04-01 | 13.39 | |
| 1988-03-01 | 14.29 | |
| 1988-02-01 | 14.16 | |
| 1988-01-01 | 14.02 | |
| 1987-12-01 | 13.77 | |
| 1987-11-01 | 14.45 | |
| 1987-10-01 | 17.08 | |
| 1987-09-01 | 20.09 | |
| 1987-08-01 | 21.42 | |
| 1987-07-01 | 20.81 | |
| 1987-06-01 | 20.90 | |
| 1987-05-01 | 19.74 | |
| 1987-04-01 | 19.45 | |
| 1987-03-01 | 19.37 | |
| 1987-02-01 | 18.86 | |
| 1987-01-01 | 18.01 | |
| 1986-12-01 | 17.17 | |
| 1986-11-01 | 16.78 | |
| 1986-10-01 | 16.12 | |
| 1986-09-01 | 16.05 | |
| 1986-08-01 | 16.55 | |
| 1986-07-01 | 16.28 | |
| 1986-06-01 | 16.68 | |
| 1986-05-01 | 16.28 | |
| 1986-04-01 | 16.32 | |
| 1986-03-01 | 16.00 | |
| 1986-02-01 | 15.08 | |
| 1986-01-01 | 14.28 | |
| 1985-12-01 | 14.19 | |
| 1985-11-01 | 13.33 | |
| 1985-10-01 | 12.39 | |
| 1985-09-01 | 12.09 | |
| 1985-08-01 | 12.26 | |
| 1985-07-01 | 12.43 | |
| 1985-06-01 | 12.10 | |
| 1985-05-01 | 11.65 | |
| 1985-04-01 | 11.20 | |
| 1985-03-01 | 10.95 | |
| 1985-02-01 | 10.98 | |
| 1985-01-01 | 10.36 | |
| 1984-12-01 | 9.89 | |
| 1984-11-01 | 10.01 | |
| 1984-10-01 | 9.94 | |
| 1984-09-01 | 10.03 | |
| 1984-08-01 | 10.00 | |
| 1984-07-01 | 9.26 | |
| 1984-06-01 | 9.45 | |
| 1984-05-01 | 9.86 | |
| 1984-04-01 | 10.12 | |
| 1984-03-01 | 10.31 | |
| 1984-02-01 | 10.59 | |
| 1984-01-01 | 11.52 | |
| 1983-12-01 | 11.72 | |
| 1983-11-01 | 11.98 | |
| 1983-10-01 | 12.38 | |
| 1983-09-01 | 12.57 | |
| 1983-08-01 | 12.43 | |
| 1983-07-01 | 13.02 | |
| 1983-06-01 | 13.22 | |
| 1983-05-01 | 13.09 | |
| 1983-04-01 | 12.64 | |
| 1983-03-01 | 12.23 | |
| 1983-02-01 | 11.75 | |
| 1983-01-01 | 11.48 | |
| 1982-12-01 | 11.03 | |
| 1982-11-01 | 10.67 | |
| 1982-10-01 | 10.01 | |
| 1982-09-01 | 9.03 | |
| 1982-08-01 | 7.97 | |
| 1982-07-01 | 7.83 | |
| 1982-06-01 | 7.74 | |
| 1982-05-01 | 8.09 | |
| 1982-04-01 | 7.97 | |
| 1982-03-01 | 7.48 | |
| 1982-02-01 | 7.64 | |
| 1982-01-01 | 7.73 | |
| 1981-12-01 | 8.06 | |
| 1981-11-01 | 8.02 | |
| 1981-10-01 | 7.83 | |
| 1981-09-01 | 7.75 | |
| 1981-08-01 | 8.54 | |
| 1981-07-01 | 8.55 | |
| 1981-06-01 | 8.81 | |
| 1981-05-01 | 8.86 | |
| 1981-04-01 | 9.13 | |
| 1981-03-01 | 9.14 | |
| 1981-02-01 | 8.76 | |
| 1981-01-01 | 9.02 | |
| 1980-12-01 | 9.01 | |
| 1980-11-01 | 9.19 | |
| 1980-10-01 | 8.86 | |
| 1980-09-01 | 8.64 | |
| 1980-08-01 | 8.38 | |
| 1980-07-01 | 8.07 | |
| 1980-06-01 | 7.67 | |
| 1980-05-01 | 7.15 | |
| 1980-04-01 | 6.79 | |
| 1980-03-01 | 6.85 | |
| 1980-02-01 | 7.61 | |
| 1980-01-01 | 7.39 | |
| 1979-12-01 | 7.25 | |
| 1979-11-01 | 7.01 | |
| 1979-10-01 | 7.11 | |
| 1979-09-01 | 7.42 | |
| 1979-08-01 | 7.45 | |
| 1979-07-01 | 7.23 | |
| 1979-06-01 | 7.27 | |
| 1979-05-01 | 7.25 | |
| 1979-04-01 | 7.55 | |
| 1979-03-01 | 7.53 | |
| 1979-02-01 | 7.57 | |
| 1979-01-01 | 7.88 | |
| 1978-12-01 | 7.79 | |
| 1978-11-01 | 7.84 | |
| 1978-10-01 | 8.51 | |
| 1978-09-01 | 8.98 | |
| 1978-08-01 | 9.07 | |
| 1978-07-01 | 8.57 | |
| 1978-06-01 | 8.70 | |
| 1978-05-01 | 8.75 | |
| 1978-04-01 | 8.41 | |
| 1978-03-01 | 8.13 | |
| 1978-02-01 | 8.16 | |
| 1978-01-01 | 8.28 | |
| 1977-12-01 | 8.62 | |
| 1977-11-01 | 8.71 | |
| 1977-10-01 | 8.70 | |
| 1977-09-01 | 8.99 | |
| 1977-08-01 | 9.21 | |
| 1977-07-01 | 9.53 | |
| 1977-06-01 | 9.53 | |
| 1977-05-01 | 9.58 | |
| 1977-04-01 | 9.72 | |
| 1977-03-01 | 9.98 | |
| 1977-02-01 | 10.08 | |
| 1977-01-01 | 10.41 | |
| 1976-12-01 | 10.57 | |
| 1976-11-01 | 10.34 | |
| 1976-10-01 | 10.54 | |
| 1976-09-01 | 11.05 | |
| 1976-08-01 | 10.93 | |
| 1976-07-01 | 11.14 | |
| 1976-06-01 | 11.01 | |
| 1976-05-01 | 11.18 | |
| 1976-04-01 | 11.51 | |
| 1976-03-01 | 11.67 | |
| 1976-02-01 | 11.94 | |
| 1976-01-01 | 11.82 | |
| 1975-12-01 | 11.14 | |
| 1975-11-01 | 11.41 | |
| 1975-10-01 | 11.32 | |
| 1975-09-01 | 10.91 | |
| 1975-08-01 | 10.95 | |
| 1975-07-01 | 11.72 | |
| 1975-06-01 | 11.61 | |
| 1975-05-01 | 11.09 | |
| 1975-04-01 | 10.22 | |
| 1975-03-01 | 9.91 | |
| 1975-02-01 | 9.32 | |
| 1975-01-01 | 8.30 | |
| 1974-12-01 | 7.54 | |
| 1974-11-01 | 8.00 | |
| 1974-10-01 | 7.68 | |
| 1974-09-01 | 7.48 | |
| 1974-08-01 | 8.46 | |
| 1974-07-01 | 8.95 | |
| 1974-06-01 | 10.27 | |
| 1974-05-01 | 10.41 | |
| 1974-04-01 | 10.89 | |
| 1974-03-01 | 11.66 | |
| 1974-02-01 | 11.27 | |
| 1974-01-01 | 11.68 | |
| 1973-12-01 | 11.62 | |
| 1973-11-01 | 12.74 | |
| 1973-10-01 | 13.99 | |
| 1973-09-01 | 13.73 | |
| 1973-08-01 | 13.77 | |
| 1973-07-01 | 14.33 | |
| 1973-06-01 | 14.50 | |
| 1973-05-01 | 15.13 | |
| 1973-04-01 | 15.89 | |
| 1973-03-01 | 16.53 | |
| 1973-02-01 | 17.11 | |
| 1973-01-01 | 18.09 | |
| 1972-12-01 | 18.30 | |
| 1972-11-01 | 18.19 | |
| 1972-10-01 | 17.58 | |
| 1972-09-01 | 17.82 | |
| 1972-08-01 | 18.25 | |
| 1972-07-01 | 17.79 | |
| 1972-06-01 | 18.09 | |
| 1972-05-01 | 18.20 | |
| 1972-04-01 | 18.56 | |
| 1972-03-01 | 18.54 | |
| 1972-02-01 | 18.22 | |
| 1972-01-01 | 18.01 | |
| 1971-12-01 | 17.40 | |
| 1971-11-01 | 16.54 | |
| 1971-10-01 | 17.62 | |
| 1971-09-01 | 18.31 | |
| 1971-08-01 | 18.03 | |
| 1971-07-01 | 18.48 | |
| 1971-06-01 | 18.74 | |
| 1971-05-01 | 19.22 | |
| 1971-04-01 | 19.61 | |
| 1971-03-01 | 19.08 | |
| 1971-02-01 | 18.71 | |
| 1971-01-01 | 18.12 | |
| 1970-12-01 | 17.55 | |
| 1970-11-01 | 16.19 | |
| 1970-10-01 | 15.97 | |
| 1970-09-01 | 15.41 | |
| 1970-08-01 | 14.39 | |
| 1970-07-01 | 13.85 | |
| 1970-06-01 | 13.69 | |
| 1970-05-01 | 13.69 | |
| 1970-04-01 | 15.37 | |
| 1970-03-01 | 15.75 | |
| 1970-02-01 | 15.35 | |
| 1970-01-01 | 15.76 | |
| 1969-12-01 | 15.76 | |
| 1969-11-01 | 16.54 | |
| 1969-10-01 | 16.32 | |
| 1969-09-01 | 16.05 | |
| 1969-08-01 | 16.04 | |
| 1969-07-01 | 16.17 | |
| 1969-06-01 | 16.98 | |
| 1969-05-01 | 17.93 | |
| 1969-04-01 | 17.39 | |
| 1969-03-01 | 17.06 | |
| 1969-02-01 | 17.50 | |
| 1969-01-01 | 17.65 | |
| 1968-12-01 | 18.49 | |
| 1968-11-01 | 18.41 | |
| 1968-10-01 | 18.23 | |
| 1968-09-01 | 17.90 | |
| 1968-08-01 | 17.43 | |
| 1968-07-01 | 17.91 | |
| 1968-06-01 | 18.04 | |
| 1968-05-01 | 17.71 | |
| 1968-04-01 | 17.45 | |
| 1968-03-01 | 16.38 | |
| 1968-02-01 | 16.80 | |
| 1968-01-01 | 17.71 | |
| 1967-12-01 | 17.88 | |
| 1967-11-01 | 17.42 | |
| 1967-10-01 | 18.02 | |
| 1967-09-01 | 18.08 | |
| 1967-08-01 | 17.79 | |
| 1967-07-01 | 17.48 | |
| 1967-06-01 | 17.15 | |
| 1967-05-01 | 17.24 | |
| 1967-04-01 | 16.81 | |
| 1967-03-01 | 16.41 | |
| 1967-02-01 | 15.93 | |
| 1967-01-01 | 15.31 | |
| 1966-12-01 | 14.65 | |
| 1966-11-01 | 14.63 | |
| 1966-10-01 | 13.96 | |
| 1966-09-01 | 14.12 | |
| 1966-08-01 | 14.68 | |
| 1966-07-01 | 15.67 | |
| 1966-06-01 | 15.76 | |
| 1966-05-01 | 16.01 | |
| 1966-04-01 | 17.03 | |
| 1966-03-01 | 16.64 | |
| 1966-02-01 | 17.52 | |
| 1966-01-01 | 17.81 | |
| 1965-12-01 | 17.67 | |
| 1965-11-01 | 18.00 | |
| 1965-10-01 | 18.10 | |
| 1965-09-01 | 17.95 | |
| 1965-08-01 | 17.53 | |
| 1965-07-01 | 17.38 | |
| 1965-06-01 | 17.57 | |
| 1965-05-01 | 18.65 | |
| 1965-04-01 | 18.59 | |
| 1965-03-01 | 18.55 | |
| 1965-02-01 | 18.71 | |
| 1965-01-01 | 18.75 | |
| 1964-12-01 | 18.45 | |
| 1964-11-01 | 18.89 | |
| 1964-10-01 | 18.87 | |
| 1964-09-01 | 18.66 | |
| 1964-08-01 | 18.54 | |
| 1964-07-01 | 19.01 | |
| 1964-06-01 | 18.53 | |
| 1964-05-01 | 18.86 | |
| 1964-04-01 | 18.90 | |
| 1964-03-01 | 18.85 | |
| 1964-02-01 | 18.75 | |
| 1964-01-01 | 18.77 | |
| 1963-12-01 | 18.45 | |
| 1963-11-01 | 18.16 | |
| 1963-10-01 | 18.35 | |
| 1963-09-01 | 18.40 | |
| 1963-08-01 | 18.11 | |
| 1963-07-01 | 17.80 | |
| 1963-06-01 | 18.26 | |
| 1963-05-01 | 18.47 | |
| 1963-04-01 | 18.32 | |
| 1963-03-01 | 17.70 | |
| 1963-02-01 | 17.83 | |
| 1963-01-01 | 17.66 | |
| 1962-12-01 | 17.07 | |
| 1962-11-01 | 16.57 | |
| 1962-10-01 | 15.70 | |
| 1962-09-01 | 16.43 | |
| 1962-08-01 | 16.67 | |
| 1962-07-01 | 16.32 | |
| 1962-06-01 | 16.03 | |
| 1962-05-01 | 18.33 | |
| 1962-04-01 | 20.00 | |
| 1962-03-01 | 20.86 | |
| 1962-02-01 | 21.21 | |
| 1962-01-01 | 21.25 | |
| 1961-12-01 | 22.49 | |
| 1961-11-01 | 22.61 | |
| 1961-10-01 | 21.96 | |
| 1961-09-01 | 22.05 | |
| 1961-08-01 | 22.27 | |
| 1961-07-01 | 21.55 | |
| 1961-06-01 | 21.66 | |
| 1961-05-01 | 21.80 | |
| 1961-04-01 | 21.44 | |
| 1961-03-01 | 20.75 | |
| 1961-02-01 | 19.74 | |
| 1961-01-01 | 18.60 | |
| 1960-12-01 | 17.37 | |
| 1960-11-01 | 16.96 | |
| 1960-10-01 | 16.43 | |
| 1960-09-01 | 16.76 | |
| 1960-08-01 | 17.30 | |
| 1960-07-01 | 17.11 | |
| 1960-06-01 | 17.56 | |
| 1960-05-01 | 16.72 | |
| 1960-04-01 | 16.65 | |
| 1960-03-01 | 16.23 | |
| 1960-02-01 | 16.45 | |
| 1960-01-01 | 17.12 | |
| 1959-12-01 | 17.42 | |
| 1959-11-01 | 16.82 | |
| 1959-10-01 | 16.68 | |
| 1959-09-01 | 16.63 | |
| 1959-08-01 | 17.37 | |
| 1959-07-01 | 17.52 | |
| 1959-06-01 | 16.90 | |
| 1959-05-01 | 17.55 | |
| 1959-04-01 | 17.81 | |
| 1959-03-01 | 18.06 | |
| 1959-02-01 | 18.04 | |
| 1959-01-01 | 18.77 | |
| 1958-12-01 | 18.51 | |
| 1958-11-01 | 18.19 | |
| 1958-10-01 | 17.67 | |
| 1958-09-01 | 17.00 | |
| 1958-08-01 | 16.47 | |
| 1958-07-01 | 15.78 | |
| 1958-06-01 | 15.27 | |
| 1958-05-01 | 14.57 | |
| 1958-04-01 | 13.79 | |
| 1958-03-01 | 13.41 | |
| 1958-02-01 | 12.83 | |
| 1958-01-01 | 12.49 | |
| 1957-12-01 | 11.97 | |
| 1957-11-01 | 11.86 | |
| 1957-10-01 | 12.00 | |
| 1957-09-01 | 12.67 | |
| 1957-08-01 | 13.27 | |
| 1957-07-01 | 14.12 | |
| 1957-06-01 | 13.90 | |
| 1957-05-01 | 13.71 | |
| 1957-04-01 | 13.22 | |
| 1957-03-01 | 12.95 | |
| 1957-02-01 | 12.77 | |
| 1957-01-01 | 13.34 | |
| 1956-12-01 | 13.62 | |
| 1956-11-01 | 13.35 | |
| 1956-10-01 | 13.43 | |
| 1956-09-01 | 13.54 | |
| 1956-08-01 | 13.83 | |
| 1956-07-01 | 13.73 | |
| 1956-06-01 | 12.85 | |
| 1956-05-01 | 12.82 | |
| 1956-04-01 | 13.13 | |
| 1956-03-01 | 12.87 | |
| 1956-02-01 | 12.12 | |
| 1956-01-01 | 12.12 | |
| 1955-12-01 | 12.53 | |
| 1955-11-01 | 12.63 | |
| 1955-10-01 | 12.03 | |
| 1955-09-01 | 12.89 | |
| 1955-08-01 | 12.60 | |
| 1955-07-01 | 12.96 | |
| 1955-06-01 | 12.35 | |
| 1955-05-01 | 12.00 | |
| 1955-04-01 | 12.39 | |
| 1955-03-01 | 12.33 | |
| 1955-02-01 | 12.70 | |
| 1955-01-01 | 12.56 | |
| 1954-12-01 | 12.62 | |
| 1954-11-01 | 12.28 | |
| 1954-10-01 | 12.02 | |
| 1954-09-01 | 11.96 | |
| 1954-08-01 | 11.70 | |
| 1954-07-01 | 11.49 | |
| 1954-06-01 | 11.05 | |
| 1954-05-01 | 11.06 | |
| 1954-04-01 | 10.74 | |
| 1954-03-01 | 10.42 | |
| 1954-02-01 | 10.26 | |
| 1954-01-01 | 10.09 | |
| 1953-12-01 | 9.89 | |
| 1953-11-01 | 9.71 | |
| 1953-10-01 | 9.45 | |
| 1953-09-01 | 9.13 | |
| 1953-08-01 | 9.61 | |
| 1953-07-01 | 9.63 | |
| 1953-06-01 | 9.54 | |
| 1953-05-01 | 10.00 | |
| 1953-04-01 | 10.06 | |
| 1953-03-01 | 10.70 | |
| 1953-02-01 | 10.69 | |
| 1953-01-01 | 10.86 | |
| 1952-12-01 | 10.85 | |
| 1952-11-01 | 10.49 | |
| 1952-10-01 | 10.22 | |
| 1952-09-01 | 10.50 | |
| 1952-08-01 | 10.70 | |
| 1952-07-01 | 10.69 | |
| 1952-06-01 | 10.42 | |
| 1952-05-01 | 10.06 | |
| 1952-04-01 | 9.97 | |
| 1952-03-01 | 9.92 | |
| 1952-02-01 | 9.84 | |
| 1952-01-01 | 9.97 | |
| 1951-12-01 | 9.59 | |
| 1951-11-01 | 9.22 | |
| 1951-10-01 | 9.39 | |
| 1951-09-01 | 9.35 | |
| 1951-08-01 | 8.87 | |
| 1951-07-01 | 8.28 | |
| 1951-06-01 | 7.92 | |
| 1951-05-01 | 7.96 | |
| 1951-04-01 | 7.85 | |
| 1951-03-01 | 7.64 | |
| 1951-02-01 | 7.76 | |
| 1951-01-01 | 7.48 | |
| 1950-12-01 | 6.95 | |
| 1950-11-01 | 7.08 | |
| 1950-10-01 | 7.20 | |
| 1950-09-01 | 7.01 | |
| 1950-08-01 | 6.93 | |
| 1950-07-01 | 6.68 | |
| 1950-06-01 | 7.38 | |
| 1950-05-01 | 7.43 | |
| 1950-04-01 | 7.35 | |
| 1950-03-01 | 7.32 | |
| 1950-02-01 | 7.31 | |
| 1950-01-01 | 7.22 | |
| 1949-12-01 | 7.13 | |
| 1949-11-01 | 6.87 | |
| 1949-10-01 | 6.71 | |
| 1949-09-01 | 6.48 | |
| 1949-08-01 | 6.39 | |
| 1949-07-01 | 6.16 | |
| 1949-06-01 | 5.82 | |
| 1949-05-01 | 6.18 | |
| 1949-04-01 | 6.24 | |
| 1949-03-01 | 6.26 | |
| 1949-02-01 | 6.29 | |
| 1949-01-01 | 6.62 | |
| 1948-12-01 | 6.63 | |
| 1948-11-01 | 6.90 | |
| 1948-10-01 | 7.55 | |
| 1948-09-01 | 7.61 | |
| 1948-08-01 | 7.97 | |
| 1948-07-01 | 8.51 | |
| 1948-06-01 | 9.04 | |
| 1948-05-01 | 8.92 | |
| 1948-04-01 | 8.75 | |
| 1948-03-01 | 8.36 | |
| 1948-02-01 | 8.41 | |
| 1948-01-01 | 9.02 | |
| 1947-12-01 | 9.34 | |
| 1947-11-01 | 9.60 | |
| 1947-10-01 | 9.84 | |
| 1947-09-01 | 9.72 | |
| 1947-08-01 | 10.22 | |
| 1947-07-01 | 10.68 | |
| 1947-06-01 | 10.31 | |
| 1947-05-01 | 10.37 | |
| 1947-04-01 | 11.00 | |
| 1947-03-01 | 11.94 | |
| 1947-02-01 | 13.17 | |
| 1947-01-01 | 13.46 | |
| 1946-12-01 | 14.27 | |
| 1946-11-01 | 14.64 | |
| 1946-10-01 | 15.58 | |
| 1946-09-01 | 16.96 | |
| 1946-08-01 | 20.27 | |
| 1946-07-01 | 21.07 | |
| 1946-06-01 | 22.12 | |
| 1946-05-01 | 21.74 | |
| 1946-04-01 | 21.20 | |
| 1946-03-01 | 19.48 | |
| 1946-02-01 | 19.64 | |
| 1946-01-01 | 19.17 | |
| 1945-12-01 | 18.05 | |
| 1945-11-01 | 17.57 | |
| 1945-10-01 | 16.84 | |
| 1945-09-01 | 16.00 | |
| 1945-08-01 | 14.93 | |
| 1945-07-01 | 14.83 | |
| 1945-06-01 | 15.09 | |
| 1945-05-01 | 15.02 | |
| 1945-04-01 | 14.67 | |
| 1945-03-01 | 14.51 | |
| 1945-02-01 | 14.67 | |
| 1945-01-01 | 14.35 | |
| 1944-12-01 | 14.09 | |
| 1944-11-01 | 13.93 | |
| 1944-10-01 | 14.19 | |
| 1944-09-01 | 14.00 | |
| 1944-08-01 | 14.13 | |
| 1944-07-01 | 14.23 | |
| 1944-06-01 | 13.77 | |
| 1944-05-01 | 13.10 | |
| 1944-04-01 | 12.83 | |
| 1944-03-01 | 13.01 | |
| 1944-02-01 | 12.61 | |
| 1944-01-01 | 12.65 | |
| 1943-12-01 | 12.21 | |
| 1943-11-01 | 11.48 | |
| 1943-10-01 | 11.50 | |
| 1943-09-01 | 11.10 | |
| 1943-08-01 | 10.80 | |
| 1943-07-01 | 11.30 | |
| 1943-06-01 | 11.00 | |
| 1943-05-01 | 10.91 | |
| 1943-04-01 | 10.59 | |
| 1943-03-01 | 10.35 | |
| 1943-02-01 | 10.12 | |
| 1943-01-01 | 9.67 | |
| 1942-12-01 | 9.24 | |
| 1942-11-01 | 9.47 | |
| 1942-10-01 | 9.61 | |
| 1942-09-01 | 9.23 | |
| 1942-08-01 | 9.01 | |
| 1942-07-01 | 8.94 | |
| 1942-06-01 | 8.50 | |
| 1942-05-01 | 7.93 | |
| 1942-04-01 | 7.69 | |
| 1942-03-01 | 7.87 | |
| 1942-02-01 | 8.01 | |
| 1942-01-01 | 7.97 | |
| 1941-12-01 | 7.55 | |
| 1941-11-01 | 8.01 | |
| 1941-10-01 | 8.33 | |
| 1941-09-01 | 8.61 | |
| 1941-08-01 | 8.83 | |
| 1941-07-01 | 9.13 | |
| 1941-06-01 | 8.95 | |
| 1941-05-01 | 8.73 | |
| 1941-04-01 | 9.01 | |
| 1941-03-01 | 9.39 | |
| 1941-02-01 | 9.36 | |
| 1941-01-01 | 10.02 | |
| 1940-12-01 | 10.03 | |
| 1940-11-01 | 10.36 | |
| 1940-10-01 | 10.03 | |
| 1940-09-01 | 9.84 | |
| 1940-08-01 | 9.56 | |
| 1940-07-01 | 9.48 | |
| 1940-06-01 | 9.30 | |
| 1940-05-01 | 10.34 | |
| 1940-04-01 | 12.19 | |
| 1940-03-01 | 12.27 | |
| 1940-02-01 | 12.73 | |
| 1940-01-01 | 13.23 | |
| 1939-12-01 | 13.74 | |
| 1939-11-01 | 14.56 | |
| 1939-10-01 | 15.36 | |
| 1939-09-01 | 15.77 | |
| 1939-08-01 | 14.55 | |
| 1939-07-01 | 15.08 | |
| 1939-06-01 | 15.04 | |
| 1939-05-01 | 15.11 | |
| 1939-04-01 | 14.90 | |
| 1939-03-01 | 17.45 | |
| 1939-02-01 | 18.06 | |
| 1939-01-01 | 18.84 | |
| 1938-12-01 | 19.83 | |
| 1938-11-01 | 20.64 | |
| 1938-10-01 | 20.84 | |
| 1938-09-01 | 18.95 | |
| 1938-08-01 | 18.37 | |
| 1938-07-01 | 17.00 | |
| 1938-06-01 | 13.26 | |
| 1938-05-01 | 11.93 | |
| 1938-04-01 | 10.95 | |
| 1938-03-01 | 10.63 | |
| 1938-02-01 | 10.79 | |
| 1938-01-01 | 10.50 | |
| 1937-12-01 | 9.75 | |
| 1937-11-01 | 9.66 | |
| 1937-10-01 | 10.32 | |
| 1937-09-01 | 11.78 | |
| 1937-08-01 | 13.91 | |
| 1937-07-01 | 13.96 | |
| 1937-06-01 | 13.37 | |
| 1937-05-01 | 14.13 | |
| 1937-04-01 | 15.05 | |
| 1937-03-01 | 16.30 | |
| 1937-02-01 | 16.77 | |
| 1937-01-01 | 16.75 | |
| 1936-12-01 | 16.73 | |
| 1936-11-01 | 17.48 | |
| 1936-10-01 | 17.47 | |
| 1936-09-01 | 17.07 | |
| 1936-08-01 | 17.25 | |
| 1936-07-01 | 17.29 | |
| 1936-06-01 | 16.69 | |
| 1936-05-01 | 16.58 | |
| 1936-04-01 | 18.15 | |
| 1936-03-01 | 18.81 | |
| 1936-02-01 | 18.65 | |
| 1936-01-01 | 17.87 | |
| 1935-12-01 | 17.16 | |
| 1935-11-01 | 17.16 | |
| 1935-10-01 | 15.68 | |
| 1935-09-01 | 15.28 | |
| 1935-08-01 | 14.64 | |
| 1935-07-01 | 13.42 | |
| 1935-06-01 | 12.49 | |
| 1935-05-01 | 12.45 | |
| 1935-04-01 | 11.95 | |
| 1935-03-01 | 11.52 | |
| 1935-02-01 | 13.82 | |
| 1935-01-01 | 16.25 | |
| 1934-12-01 | 18.90 | |
| 1934-11-01 | 18.94 | |
| 1934-10-01 | 18.58 | |
| 1934-09-01 | 18.60 | |
| 1934-08-01 | 19.23 | |
| 1934-07-01 | 20.18 | |
| 1934-06-01 | 21.38 | |
| 1934-05-01 | 21.29 | |
| 1934-04-01 | 23.91 | |
| 1934-03-01 | 23.73 | |
| 1934-02-01 | 25.25 | |
| 1934-01-01 | 23.73 | |
| 1933-12-01 | 22.66 | |
| 1933-11-01 | 22.35 | |
| 1933-10-01 | 21.95 | |
| 1933-09-01 | 24.46 | |
| 1933-08-01 | 24.81 | |
| 1933-07-01 | 26.27 | |
| 1933-06-01 | 24.45 | |
| 1933-05-01 | 20.99 | |
| 1933-04-01 | 16.40 | |
| 1933-03-01 | 14.92 | |
| 1933-02-01 | 15.06 | |
| 1933-01-01 | 17.19 | |
| 1932-12-01 | 16.63 | |
| 1932-11-01 | 16.52 | |
| 1932-10-01 | 16.06 | |
| 1932-09-01 | 17.96 | |
| 1932-08-01 | 15.80 | |
| 1932-07-01 | 10.16 | |
| 1932-06-01 | 9.35 | |
| 1932-05-01 | 10.46 | |
| 1932-04-01 | 11.56 | |
| 1932-03-01 | 14.75 | |
| 1932-02-01 | 14.27 | |
| 1932-01-01 | 13.99 | |
| 1931-12-01 | 13.84 | |
| 1931-11-01 | 16.23 | |
| 1931-10-01 | 15.30 | |
| 1931-09-01 | 16.90 | |
| 1931-08-01 | 19.04 | |
| 1931-07-01 | 18.86 | |
| 1931-06-01 | 17.56 | |
| 1931-05-01 | 17.48 | |
| 1931-04-01 | 18.66 | |
| 1931-03-01 | 19.92 | |
| 1931-02-01 | 18.90 | |
| 1931-01-01 | 17.00 | |
| 1930-12-01 | 15.99 | |
| 1930-11-01 | 16.25 | |
| 1930-10-01 | 16.64 | |
| 1930-09-01 | 18.39 | |
| 1930-08-01 | 17.57 | |
| 1930-07-01 | 17.03 | |
| 1930-06-01 | 16.68 | |
| 1930-05-01 | 17.83 | |
| 1930-04-01 | 18.22 | |
| 1930-03-01 | 16.51 | |
| 1930-02-01 | 15.35 | |
| 1930-01-01 | 13.94 | |
| 1929-12-01 | 13.29 | |
| 1929-11-01 | 12.94 | |
| 1929-10-01 | 17.81 | |
| 1929-09-01 | 20.17 | |
| 1929-08-01 | 19.63 | |
| 1929-07-01 | 18.81 | |
| 1929-06-01 | 17.49 | |
| 1929-05-01 | 17.38 | |
| 1929-04-01 | 17.35 | |
| 1929-03-01 | 17.68 | |
| 1929-02-01 | 17.62 | |
| 1929-01-01 | 17.77 | |
| 1928-12-01 | 16.78 | |
| 1928-11-01 | 16.99 | |
| 1928-10-01 | 16.18 | |
| 1928-09-01 | 16.14 | |
| 1928-08-01 | 15.33 | |
| 1928-07-01 | 15.11 | |
| 1928-06-01 | 15.28 | |
| 1928-05-01 | 16.37 | |
| 1928-04-01 | 16.17 | |
| 1928-03-01 | 15.51 | |
| 1928-02-01 | 15.00 | |
| 1928-01-01 | 15.47 | |
| 1927-12-01 | 15.73 | |
| 1927-11-01 | 15.22 | |
| 1927-10-01 | 14.73 | |
| 1927-09-01 | 14.82 | |
| 1927-08-01 | 13.90 | |
| 1927-07-01 | 13.08 | |
| 1927-06-01 | 12.67 | |
| 1927-05-01 | 12.39 | |
| 1927-04-01 | 11.87 | |
| 1927-03-01 | 11.48 | |
| 1927-02-01 | 11.22 | |
| 1927-01-01 | 10.90 | |
| 1926-12-01 | 10.88 | |
| 1926-11-01 | 10.63 | |
| 1926-10-01 | 10.48 | |
| 1926-09-01 | 10.72 | |
| 1926-08-01 | 10.56 | |
| 1926-07-01 | 10.14 | |
| 1926-06-01 | 9.73 | |
| 1926-05-01 | 9.28 | |
| 1926-04-01 | 9.21 | |
| 1926-03-01 | 9.46 | |
| 1926-02-01 | 10.15 | |
| 1926-01-01 | 10.13 | |
| 1925-12-01 | 9.97 | |
| 1925-11-01 | 10.02 | |
| 1925-10-01 | 9.93 | |
| 1925-09-01 | 9.84 | |
| 1925-08-01 | 9.84 | |
| 1925-07-01 | 9.94 | |
| 1925-06-01 | 9.91 | |
| 1925-05-01 | 9.98 | |
| 1925-04-01 | 9.91 | |
| 1925-03-01 | 10.29 | |
| 1925-02-01 | 10.85 | |
| 1925-01-01 | 11.06 | |
| 1924-12-01 | 10.92 | |
| 1924-11-01 | 10.32 | |
| 1924-10-01 | 9.73 | |
| 1924-09-01 | 9.81 | |
| 1924-08-01 | 9.87 | |
| 1924-07-01 | 9.50 | |
| 1924-06-01 | 9.04 | |
| 1924-05-01 | 8.83 | |
| 1924-04-01 | 8.82 | |
| 1924-03-01 | 8.99 | |
| 1924-02-01 | 9.13 | |
| 1924-01-01 | 9.05 | |
| 1923-12-01 | 8.72 | |
| 1923-11-01 | 8.65 | |
| 1923-10-01 | 8.62 | |
| 1923-09-01 | 8.98 | |
| 1923-08-01 | 9.17 | |
| 1923-07-01 | 9.38 | |
| 1923-06-01 | 9.99 | |
| 1923-05-01 | 10.69 | |
| 1923-04-01 | 11.57 | |
| 1923-03-01 | 12.37 | |
| 1923-02-01 | 12.57 | |
| 1923-01-01 | 12.46 | |
| 1922-12-01 | 12.72 | |
| 1922-11-01 | 13.40 | |
| 1922-10-01 | 14.86 | |
| 1922-09-01 | 15.36 | |
| 1922-08-01 | 15.86 | |
| 1922-07-01 | 16.26 | |
| 1922-06-01 | 17.24 | |
| 1922-05-01 | 18.68 | |
| 1922-04-01 | 19.40 | |
| 1922-03-01 | 19.85 | |
| 1922-02-01 | 20.91 | |
| 1922-01-01 | 22.58 | |
| 1921-12-01 | 25.21 | |
| 1921-11-01 | 21.23 | |
| 1921-10-01 | 17.87 | |
| 1921-09-01 | 15.83 | |
| 1921-08-01 | 14.02 | |
| 1921-07-01 | 13.00 | |
| 1921-06-01 | 12.02 | |
| 1921-05-01 | 12.12 | |
| 1921-04-01 | 10.97 | |
| 1921-03-01 | 10.23 | |
| 1921-02-01 | 9.87 | |
| 1921-01-01 | 9.39 | |
| 1920-12-01 | 8.51 | |
| 1920-11-01 | 9.23 | |
| 1920-10-01 | 9.59 | |
| 1920-09-01 | 9.45 | |
| 1920-08-01 | 9.01 | |
| 1920-07-01 | 9.26 | |
| 1920-06-01 | 9.16 | |
| 1920-05-01 | 9.20 | |
| 1920-04-01 | 9.70 | |
| 1920-03-01 | 9.66 | |
| 1920-02-01 | 8.92 | |
| 1920-01-01 | 9.61 |