
| 2024 | 0.3 | 1.35 | 68.52 | 22.2% |
| 2023 | 0.29 | 1.41 | 71.61 | 20.6% |
| 2022 | 0.26 | 1.38 | 70.8 | 19% |
| 2021 | 0.24 | 1.4 | 72.18 | 17% |
| 2020 | 0.24 | 1.29 | 66.53 | 18.7% |
| 2019 | 0.26 | 1.39 | 72.49 | 18.7% |
| 2018 | 0.26 | 1.38 | 72.88 | 19.1% |
| 2017 | 0.25 | 1.34 | 72.25 | 18.9% |
| 2016 | 0.25 | 1.3 | 71.42 | 19.3% |
| 2015 | 0.25 | 1.24 | 68.63 | 20.4% |
| 2014 | 0.24 | 1.2 | 67.02 | 19.9% |
| 2013 | 0.23 | 1.25 | 70.5 | 18.7% |
| 2012 | 0.2 | 1.19 | 68.14 | 16.5% |
| 2011 | 0.21 | 1.2 | 69.16 | 17.6% |
| 2010 | 0.2 | 1.12 | 65.11 | 17.8% |
| 2009 | 0.22 | 1.09 | 64.26 | 20.5% |
| 2008 | 0.2 | 1.12 | 66.72 | 17.9% |
| 2007 | 0.19 | 1.11 | 66.6 | 17.4% |
| 2006 | 0.21 | 1.08 | 65.38 | 19.8% |
| 2005 | 0.2 | 1.07 | 65.46 | 18.8% |
| 2004 | 0.17 | 1.04 | 64.21 | 16.8% |
| 2003 | 0.18 | 0.95 | 59.51 | 18.6% |
| 2002 | 0.19 | 0.92 | 57.88 | 21% |
| 2001 | 0.17 | 0.88 | 55.82 | 18.9% |
| 2000 | 0.14 | 0.85 | 54.84 | 16.7% |
| 1999 | 0.13 | 0.88 | 57.17 | 14.5% |
| 1998 | 0.17 | 0.82 | 54.08 | 21.3% |
| 1997 | 0.2 | 0.81 | 54.05 | 24.5% |
| 1996 | 0.19 | 0.72 | 48.61 | 26.5% |
| 1995 | 0.2 | 0.65 | 44.96 | 30.4% |
| 1994 | 0.2 | 0.6 | 42.22 | 33.3% |
| 1993 | 0.2 | 0.55 | 39.27 | 35.8% |
| 1992 | 0.2 | 0.52 | 37.11 | 38% |
| 1991 | 0.19 | 0.48 | 34.87 | 39.6% |
| 1990 | 0.2 | 0.49 | 36.11 | 41.7% |
| 1989 | 0.18 | 0.44 | 33 | 41.2% |
| 1988 | 0.17 | 0.37 | 28.52 | 45.6% |
| 1987 | 0.17 | 0.32 | 25.38 | 52.8% |
| 1986 | 0.17 | 0.31 | 24.95 | 55.2% |
| 1985 | 0.19 | 0.31 | 25.41 | 59.1% |
| 1984 | 0.19 | 0.32 | 26.6 | 59% |
| 1983 | 0.1 | 0.31 | 25.67 | 31.3% |
| 1982 | 0.1 | 0.32 | 26.74 | 30.7% |
| 1981 | 0.13 | 0.37 | 31.52 | 35.8% |
| 1980 | 0.13 | 0.38 | 32.67 | 35% |