
| 2024 | 0.61 | 0.08 | 13.16 | 725.9% |
| 2023 | 0.61 | 0.08 | 12.95 | 765.6% |
| 2022 | 0.64 | 0.08 | 13.3 | 803% |
| 2021 | 0.62 | 0.07 | 12.63 | 833.5% |
| 2020 | 0.66 | 0.07 | 12.7 | 901.8% |
| 2019 | 0.75 | 0.07 | 11.78 | 1136.4% |
| 2018 | 0.77 | 0.06 | 11.5 | 1214.1% |
| 2017 | 0.57 | 0.07 | 12.26 | 861.7% |
| 2016 | 0.49 | 0.09 | 17.28 | 538.4% |
| 2015 | 0.57 | 0.09 | 18.6 | 605.2% |
| 2014 | 0.56 | 0.09 | 19.02 | 595.8% |
| 2013 | 0.58 | 0.1 | 20.51 | 586% |
| 2012 | 0.61 | 0.08 | 16.36 | 791.1% |
| 2011 | 0.67 | 0.08 | 16.59 | 870.2% |
| 2010 | 0.76 | 0.07 | 14.6 | 1171.5% |
| 2009 | 0.6 | 0.05 | 11.09 | 1257.1% |
| 2008 | 0.52 | 0.04 | 9.35 | 1351.4% |
| 2007 | 0.48 | 0.03 | 8.47 | 1431.2% |
| 2006 | 0.59 | 0.03 | 6.97 | 2210% |
| 2005 | 0.52 | 0.02 | 5.99 | 2359% |
| 2004 | 0.47 | 0.02 | 4.47 | 2970.5% |
| 2003 | 0.45 | 0.01 | 4.29 | 3072.7% |
| 2002 | 0.5 | 0.01 | 3.62 | 4107.8% |
| 2001 | 0.52 | 0.01 | 4.27 | 3698.4% |
| 2000 | 0.56 | 0.01 | 3.54 | 4997.5% |
| 1999 | 0.56 | 0.01 | 3.36 | 5475.7% |
| 1998 | 0.52 | 0.01 | 4.04 | 4375.6% |
| 1997 | 0.48 | 0.01 | 4.24 | 3895.6% |
| 1996 | 0.43 | 0.01 | 4.43 | 3398.4% |
| 1995 | 0.38 | 0.01 | 4.48 | 3100.7% |
| 1994 | 0.37 | 0.01 | 4.56 | 3053.3% |
| 1993 | 0.4 | 0.01 | 4.91 | 3136.4% |
| 1992 | 0.37 | 0.01 | 5.53 | 2686.7% |
| 1991 | 0.33 | 0.01 | 5.83 | 2329.5% |
| 1990 | 0.33 | 0.02 | 6.67 | 2084.4% |
| 1989 | 0.33 | 0.01 | 6.3 | 2253.3% |
| 1988 | 0.29 | 0.01 | 5.78 | 2240.2% |
| 1987 | 0.26 | 0.02 | 7.58 | 1585.3% |
| 1986 | 0.25 | 0.01 | 6.32 | 1835.6% |
| 1985 | 0.24 | 0.01 | 7.09 | 1653.6% |
| 1984 | 0.25 | 0.0098 | 4.88 | 2551.8% |
| 1983 | 0.0015 | 0.0096 | 4.92 | 15.8% |
| 1982 | 0.0012 | 0.01 | 5.85 | 10.9% |
| 1981 | 0.00098 | 0.01 | 6.88 | 7.6% |
| 1980 | 0.00086 | 0.01 | 5.83 | 8.1% |