
| 2024 | 0.04 | 0.18 | 6.06 | 21.2% |
| 2023 | 0.04 | 0.17 | 5.73 | 21.6% |
| 2022 | 0.04 | 0.18 | 6.21 | 19.9% |
| 2021 | 0.03 | 0.16 | 5.57 | 20.3% |
| 2020 | 0.02 | 0.16 | 5.37 | 13.8% |
| 2019 | 0.02 | 0.12 | 4.37 | 17.3% |
| 2018 | 0.02 | 0.14 | 5.1 | 11.8% |
| 2017 | 0.02 | 0.13 | 4.55 | 12.5% |
| 2016 | 0.01 | 0.11 | 3.97 | 13.2% |
| 2015 | 0.01 | 0.07 | 2.59 | 16.8% |
| 2014 | 0.01 | 0.08 | 2.89 | 16.6% |
| 2013 | 0.01 | 0.07 | 2.68 | 16.5% |
| 2012 | 0.01 | 0.07 | 2.5 | 17.8% |
| 2011 | 0.01 | 0.06 | 2.33 | 18.8% |
| 2010 | 0.01 | 0.06 | 2.21 | 18.3% |
| 2009 | 0.01 | 0.06 | 2.06 | 19.2% |
| 2008 | 0.0097 | 0.05 | 1.78 | 20.2% |
| 2007 | 0.0096 | 0.04 | 1.56 | 23.1% |
| 2006 | 0.0094 | 0.04 | 1.6 | 22.3% |
| 2005 | 0.0087 | 0.04 | 1.69 | 19.5% |
| 2004 | 0.0083 | 0.04 | 1.65 | 19.3% |
| 2003 | 0.0079 | 0.04 | 1.7 | 18.1% |
| 2002 | 0.0074 | 0.04 | 1.63 | 17.8% |
| 2001 | 0.0064 | 0.04 | 1.63 | 15.8% |
| 2000 | 0.0058 | 0.04 | 1.6 | 14.8% |
| 1999 | 0.0051 | 0.04 | 1.62 | 13% |
| 1998 | 0.004 | 0.04 | 1.49 | 11.3% |
| 1997 | 0.0037 | 0.03 | 1.21 | 13.2% |
| 1996 | 0.0041 | 0.02 | 1.08 | 16.6% |
| 1995 | 0.004 | 0.02 | 0.94 | 19.2% |
| 1994 | 0.0033 | 0.02 | 0.91 | 16.5% |
| 1993 | 0.003 | 0.02 | 0.82 | 17.3% |
| 1992 | 0.0029 | 0.02 | 0.82 | 16.9% |
| 1991 | 0.0031 | 0.02 | 0.76 | 20.4% |
| 1990 | 0.003 | 0.01 | 0.66 | 23.4% |
| 1989 | 0.0018 | 0.01 | 0.63 | 15.3% |
| 1988 | 0.0019 | 0.01 | 0.63 | 16.1% |
| 1987 | 0.0019 | 0.01 | 0.66 | 15.4% |
| 1986 | 0.0015 | 0.01 | 0.61 | 13.6% |
| 1985 | 0.0011 | 0.008 | 0.46 | 14.2% |
| 1984 | 0.0011 | 0.0089 | 0.52 | 12.8% |
| 1983 | 0.0011 | 0.0089 | 0.53 | 12% |
| 1982 | 0.0007 | 0.0083 | 0.51 | 8.5% |
| 1981 | 0.00071 | 0.006 | 0.38 | 11.7% |
| 1980 | 0.0006 | 0.0063 | 0.4 | 9.6% |