
| 2024 | 0.04 | 0.17 | 32.85 | 22.5% |
| 2023 | 0.04 | 0.17 | 33.88 | 23.3% |
| 2022 | 0.04 | 0.16 | 31.44 | 26.8% |
| 2021 | 0.04 | 0.15 | 30.62 | 28.7% |
| 2020 | 0.04 | 0.14 | 27.65 | 29.4% |
| 2019 | 0.04 | 0.16 | 31.88 | 24.9% |
| 2018 | 0.04 | 0.16 | 32.22 | 24.8% |
| 2017 | 0.04 | 0.15 | 31.19 | 25.8% |
| 2016 | 0.04 | 0.15 | 30.51 | 26.6% |
| 2015 | 0.04 | 0.14 | 29.15 | 28% |
| 2014 | 0.03 | 0.14 | 29.22 | 24.4% |
| 2013 | 0.03 | 0.14 | 28.84 | 24.6% |
| 2012 | 0.03 | 0.13 | 28.55 | 25.8% |
| 2011 | 0.03 | 0.13 | 28.56 | 23.7% |
| 2010 | 0.03 | 0.13 | 28.65 | 23.9% |
| 2009 | 0.03 | 0.13 | 28.43 | 24.1% |
| 2008 | 0.03 | 0.13 | 29.81 | 25.3% |
| 2007 | 0.03 | 0.13 | 30.31 | 24.5% |
| 2006 | 0.03 | 0.12 | 28.6 | 25% |
| 2005 | 0.03 | 0.12 | 27.42 | 25.9% |
| 2004 | 0.03 | 0.11 | 26.18 | 26.2% |
| 2003 | 0.03 | 0.11 | 26.53 | 23.7% |
| 2002 | 0.03 | 0.11 | 25.77 | 25.1% |
| 2001 | 0.02 | 0.1 | 25.2 | 23% |
| 2000 | 0.02 | 0.1 | 25.21 | 23.5% |
| 1999 | 0.02 | 0.1 | 25.73 | 20.6% |
| 1998 | 0.02 | 0.09 | 23.48 | 18.9% |
| 1997 | 0.02 | 0.08 | 22.25 | 22.5% |
| 1996 | 0.01 | 0.08 | 21.05 | 19.4% |
| 1995 | 0.01 | 0.08 | 21.91 | 17.8% |
| 1994 | 0.01 | 0.07 | 21.17 | 20.5% |
| 1993 | 0.01 | 0.07 | 21.29 | 20.9% |
| 1992 | 0.01 | 0.07 | 20.05 | 20.9% |
| 1991 | 0.01 | 0.05 | 16.84 | 23.1% |
| 1990 | 0.01 | 0.05 | 16.31 | 22.4% |
| 1989 | 0.01 | 0.05 | 17.35 | 21.2% |
| 1988 | 0.01 | 0.05 | 16.48 | 21.2% |
| 1987 | 0.01 | 0.04 | 15.1 | 23.4% |
| 1986 | 0.0098 | 0.04 | 13.55 | 25.8% |
| 1985 | 0.0095 | 0.04 | 14.74 | 23.4% |
| 1984 | 0.01 | 0.04 | 14.21 | 27% |
| 1983 | 0.0096 | 0.04 | 15.89 | 23.4% |
| 1982 | 0.0081 | 0.04 | 15.42 | 20.9% |
| 1981 | 0.0078 | 0.04 | 16.7 | 19% |
| 1980 | 0.0072 | 0.04 | 16.97 | 17.8% |