
| 2024 | 0.16 | 0.23 | 13.85 | 70.1% |
| 2023 | 0.12 | 0.18 | 11.21 | 64.9% |
| 2022 | 0.11 | 0.2 | 12.21 | 57.1% |
| 2021 | 0.1 | 0.13 | 7.96 | 81.9% |
| 2020 | 0.08 | 0.11 | 7.29 | 71.3% |
| 2019 | 0.08 | 0.13 | 8.72 | 61.5% |
| 2018 | 0.1 | 0.15 | 9.73 | 70.2% |
| 2017 | 0.09 | 0.13 | 8.87 | 67.2% |
| 2016 | 0.08 | 0.14 | 9.78 | 56.1% |
| 2015 | 0.13 | 0.16 | 10.88 | 80.1% |
| 2014 | 0.16 | 0.15 | 10.73 | 106.5% |
| 2013 | 0.1 | 0.16 | 11.3 | 60.1% |
| 2012 | 0.06 | 0.15 | 11.07 | 38.5% |
| 2011 | 0.08 | 0.14 | 10.22 | 59% |
| 2010 | 0.08 | 0.12 | 9.05 | 68% |
| 2009 | 0.06 | 0.11 | 8.12 | 56.6% |
| 2008 | 0.08 | 0.11 | 8.19 | 78.2% |
| 2007 | 0.1 | 0.14 | 10.71 | 74.5% |
| 2006 | 0.11 | 0.14 | 11.15 | 74.9% |
| 2005 | 0.11 | 0.14 | 11.35 | 75% |
| 2004 | 0.1 | 0.13 | 10.66 | 75% |
| 2003 | 0.11 | 0.15 | 11.91 | 72.7% |
| 2002 | 0.11 | 0.16 | 13.32 | 68.9% |
| 2001 | 0.11 | 0.17 | 13.95 | 67.4% |
| 2000 | 0.12 | 0.18 | 14.85 | 67.7% |
| 1999 | 0.12 | 0.19 | 16.28 | 64.8% |
| 1998 | 0.11 | 0.17 | 14.76 | 63.8% |
| 1997 | 0.11 | 0.17 | 14.78 | 63.2% |
| 1996 | 0.12 | 0.17 | 15.23 | 68.4% |
| 1995 | 0.12 | 0.17 | 15.25 | 72.3% |
| 1994 | 0.14 | 0.17 | 15.66 | 82.6% |
| 1993 | 0.14 | 0.18 | 16.34 | 77% |
| 1992 | 0.15 | 0.18 | 16.5 | 83.6% |
| 1991 | 0.15 | 0.19 | 18.16 | 80.2% |
| 1990 | 0.15 | 0.18 | 18.03 | 81.8% |
| 1989 | 0.13 | 0.17 | 17.64 | 75.1% |
| 1988 | 0.13 | 0.16 | 17.12 | 76.6% |
| 1987 | 0.13 | 0.17 | 18.05 | 77.2% |
| 1986 | 0.1 | 0.14 | 15.79 | 70.5% |
| 1985 | 0.09 | 0.12 | 14.37 | 70.4% |
| 1984 | 0.08 | 0.12 | 13.74 | 69% |
| 1983 | 0.08 | 0.11 | 13.96 | 68.9% |
| 1982 | 0.08 | 0.11 | 14.08 | 70.2% |
| 1981 | 0.08 | 0.11 | 15.16 | 66.7% |
| 1980 | 0.08 | 0.11 | 16.16 | 72.7% |