
| 2024 | 0.04 | 0.06 | 76.71 | 67.2% |
| 2023 | 0.04 | 0.05 | 68.31 | 71.1% |
| 2022 | 0.04 | 0.05 | 68.79 | 74.8% |
| 2021 | 0.04 | 0.05 | 64.46 | 80.1% |
| 2020 | 0.04 | 0.03 | 40.26 | 133.6% |
| 2019 | 0.03 | 0.02 | 27.99 | 152.1% |
| 2018 | 0.03 | 0.02 | 27.62 | 126.8% |
| 2017 | 0.03 | 0.02 | 24.37 | 156.6% |
| 2016 | 0.03 | 0.02 | 23.15 | 166.6% |
| 2015 | 0.03 | 0.02 | 21.22 | 176.9% |
| 2014 | 0.03 | 0.02 | 20.48 | 171.5% |
| 2013 | 0.03 | 0.02 | 20.77 | 179.1% |
| 2012 | 0.02 | 0.01 | 19.65 | 174.9% |
| 2011 | 0.03 | 0.01 | 18.2 | 197% |
| 2010 | 0.03 | 0.01 | 17.72 | 210.8% |
| 2009 | 0.02 | 0.01 | 15.3 | 234.8% |
| 2008 | 0.02 | 0.0083 | 12.03 | 301.6% |
| 2007 | 0.02 | 0.0089 | 13.14 | 264.5% |
| 2006 | 0.02 | 0.01 | 17.38 | 144% |
| 2005 | 0.01 | 0.0079 | 11.95 | 130.9% |
| 2004 | 0.0092 | 0.0068 | 10.5 | 134.5% |
| 2003 | 0.0096 | 0.0063 | 9.86 | 153.4% |
| 2002 | 0.0086 | 0.006 | 9.6 | 144.2% |
| 2001 | 0.0078 | 0.0054 | 8.9 | 143% |
| 2000 | 0.0074 | 0.0048 | 8.05 | 153.9% |
| 1999 | 0.0072 | 0.0043 | 7.41 | 167.4% |
| 1998 | 0.0071 | 0.0042 | 7.37 | 169.3% |
| 1997 | 0.0071 | 0.0043 | 7.67 | 165.8% |
| 1996 | 0.0074 | 0.0037 | 6.75 | 199.1% |
| 1995 | 0.0069 | 0.0033 | 5.93 | 212.3% |
| 1994 | 0.0067 | 0.0027 | 4.83 | 250.9% |
| 1993 | 0.0062 | 0.0022 | 3.88 | 289.7% |
| 1992 | 0.0055 | 0.002 | 3.54 | 269.8% |
| 1991 | 0.0054 | 0.002 | 3.38 | 264.8% |
| 1990 | 0.0053 | 0.002 | 3.32 | 270.8% |
| 1989 | 0.0053 | 0.0013 | 2.33 | 392.9% |
| 1988 | 0.0052 | 0.0013 | 2.33 | 404.6% |
| 1987 | 0.004 | 0.0012 | 2.24 | 331.3% |
| 1986 | 0.001 | 0.00062 | 1.17 | 168.4% |
| 1985 | 0.000034 | 0.0005 | 0.99 | 6.8% |
| 1984 | 0.000034 | 0.00046 | 0.94 | 7.4% |
| 1983 | 0.00003 | 0.00044 | 0.93 | 6.8% |
| 1982 | 0.000029 | 0.00045 | 0.98 | 6.5% |
| 1981 | 0.000025 | 0.00045 | 0.99 | 5.7% |
| 1980 | 0.000021 | 0.000093 | 0.21 | 22.9% |