
| 2024 | 0.08 | 0.31 | 2.34 | 27% |
| 2023 | 0.07 | 0.3 | 2.34 | 23.8% |
| 2022 | 0.06 | 0.28 | 2.22 | 21.4% |
| 2021 | 0.05 | 0.27 | 2.17 | 20.3% |
| 2020 | 0.05 | 0.23 | 1.97 | 22.8% |
| 2019 | 0.05 | 0.27 | 2.35 | 19.3% |
| 2018 | 0.05 | 0.24 | 2.1 | 20.6% |
| 2017 | 0.04 | 0.22 | 1.98 | 20.7% |
| 2016 | 0.04 | 0.22 | 2.04 | 19.8% |
| 2015 | 0.04 | 0.19 | 1.82 | 19% |
| 2014 | 0.03 | 0.18 | 1.78 | 18.2% |
| 2013 | 0.03 | 0.16 | 1.59 | 19.1% |
| 2012 | 0.03 | 0.13 | 1.4 | 19.6% |
| 2011 | 0.02 | 0.12 | 1.31 | 17.9% |
| 2010 | 0.02 | 0.11 | 1.23 | 15.6% |
| 2009 | 0.01 | 0.11 | 1.21 | 11.8% |
| 2008 | 0.01 | 0.1 | 1.21 | 11.4% |
| 2007 | 0.01 | 0.1 | 1.17 | 12.2% |
| 2006 | 0.01 | 0.09 | 1.07 | 13.4% |
| 2005 | 0.01 | 0.08 | 1.01 | 12.8% |
| 2004 | 0.009 | 0.07 | 0.9 | 13.1% |
| 2003 | 0.0082 | 0.06 | 0.87 | 12.7% |
| 2002 | 0.0073 | 0.06 | 0.84 | 12.1% |
| 2001 | 0.0072 | 0.06 | 0.84 | 12.4% |
| 2000 | 0.006 | 0.05 | 0.81 | 11% |
| 1999 | 0.0055 | 0.05 | 0.78 | 10.8% |
| 1998 | 0.0054 | 0.04 | 0.65 | 13.1% |
| 1997 | 0.0053 | 0.03 | 0.48 | 17.9% |
| 1996 | 0.0051 | 0.03 | 0.49 | 17.3% |
| 1995 | 0.0048 | 0.04 | 0.65 | 12.8% |
| 1994 | 0.0046 | 0.03 | 0.63 | 13.1% |
| 1993 | 0.0043 | 0.05 | 0.94 | 8.5% |
| 1992 | 0.0038 | 0.05 | 1.04 | 7.2% |
| 1991 | 0.0037 | 0.04 | 0.77 | 9.8% |
| 1990 | 0.0037 | 0.05 | 0.95 | 8.2% |
| 1989 | 0.0034 | 0.04 | 0.98 | 7.6% |
| 1988 | 0.0033 | 0.04 | 0.97 | 7.7% |
| 1987 | 0.003 | 0.04 | 1.03 | 6.9% |
| 1986 | 0.0028 | 0.04 | 0.95 | 7.2% |
| 1985 | 0.0025 | 0.04 | 1.01 | 6.3% |
| 1984 | 0.0023 | 0.03 | 0.87 | 6.9% |
| 1983 | 0.0021 | 0.03 | 0.89 | 6.3% |
| 1982 | 0.002 | 0.03 | 0.8 | 6.7% |
| 1981 | 0.0017 | 0.03 | 0.76 | 6.4% |
| 1980 | 0.0016 | 0.03 | 0.78 | 6% |