
| 2024 | 4.4 | 8.56 | 128.7 | 51.4% |
| 2023 | 3.96 | 8.39 | 126.2 | 47.2% |
| 2022 | 3.44 | 8.36 | 126.2 | 41.2% |
| 2021 | 4.32 | 9.17 | 138.8 | 47.1% |
| 2020 | 4.09 | 8.5 | 129 | 48% |
| 2019 | 4.53 | 9.63 | 146.5 | 47% |
| 2018 | 4.68 | 9.81 | 149.7 | 47.7% |
| 2017 | 4.44 | 9.85 | 150.9 | 45.1% |
| 2016 | 4.52 | 9.83 | 151 | 46% |
| 2015 | 4.84 | 9.97 | 153.7 | 48.5% |
| 2014 | 4.83 | 9.9 | 153.1 | 48.8% |
| 2013 | 4.73 | 10.31 | 160.2 | 45.9% |
| 2012 | 4.71 | 10.26 | 160.1 | 45.9% |
| 2011 | 4.8 | 10.45 | 164 | 46% |
| 2010 | 4.71 | 10.52 | 165.8 | 44.8% |
| 2009 | 4.51 | 10.32 | 163.6 | 43.7% |
| 2008 | 4.8 | 10.9 | 173.6 | 44% |
| 2007 | 4.74 | 10.86 | 173.9 | 43.7% |
| 2006 | 4.81 | 11.09 | 178.7 | 43.4% |
| 2005 | 4.81 | 11.1 | 180.1 | 43.3% |
| 2004 | 4.79 | 10.93 | 178.7 | 43.8% |
| 2003 | 4.76 | 10.75 | 176.9 | 44.3% |
| 2002 | 4.73 | 10.66 | 176.6 | 44.4% |
| 2001 | 4.65 | 10.61 | 177.1 | 43.8% |
| 2000 | 4.59 | 10.44 | 175.5 | 43.9% |
| 1999 | 4.44 | 10.23 | 173.2 | 43.4% |
| 1998 | 4.36 | 10.17 | 173.1 | 42.9% |
| 1997 | 4.5 | 10 | 170.8 | 45% |
| 1996 | 4.58 | 10.05 | 172.1 | 45.6% |
| 1995 | 4.45 | 9.65 | 165.9 | 46.1% |
| 1994 | 4.34 | 9.34 | 161 | 46.4% |
| 1993 | 4.41 | 9.44 | 163.3 | 46.7% |
| 1992 | 4.15 | 9.47 | 164.5 | 43.8% |
| 1991 | 4.07 | 9.45 | 164.9 | 43.1% |
| 1990 | 3.9 | 8.87 | 155.6 | 44% |
| 1989 | 3.73 | 8.72 | 153.8 | 42.8% |
| 1988 | 3.55 | 8.36 | 148.3 | 42.4% |
| 1987 | 3.49 | 8.27 | 147.5 | 42.2% |
| 1986 | 3.39 | 8.2 | 147.1 | 41.3% |
| 1985 | 3.14 | 8.06 | 145.2 | 39% |
| 1984 | 2.95 | 7.85 | 142.2 | 37.6% |
| 1983 | 2.4 | 7.62 | 138.8 | 31.5% |
| 1982 | 2.06 | 7.53 | 137.9 | 27.4% |
| 1981 | 2.07 | 7.78 | 143.5 | 26.6% |
| 1980 | 1.78 | 8.17 | 151.4 | 21.8% |