
| 2024 | 0.78 | 1.97 | 11.34 | 39.8% |
| 2023 | 0.9 | 2.03 | 11.84 | 44.1% |
| 2022 | 0.9 | 1.92 | 11.31 | 46.8% |
| 2021 | 0.93 | 1.87 | 11.12 | 50.1% |
| 2020 | 0.95 | 1.67 | 10.06 | 57% |
| 2019 | 1 | 1.7 | 10.33 | 58.8% |
| 2018 | 1.05 | 1.57 | 9.59 | 67.2% |
| 2017 | 1.08 | 1.59 | 9.83 | 67.6% |
| 2016 | 1.13 | 1.52 | 9.44 | 74.7% |
| 2015 | 1.03 | 1.39 | 8.73 | 73.8% |
| 2014 | 0.92 | 1.24 | 7.83 | 74.5% |
| 2013 | 0.88 | 1.15 | 7.34 | 76.6% |
| 2012 | 0.85 | 1.11 | 7.16 | 76.8% |
| 2011 | 0.78 | 1.01 | 6.6 | 76.8% |
| 2010 | 0.78 | 0.96 | 6.33 | 80.9% |
| 2009 | 0.76 | 0.92 | 6.07 | 82.9% |
| 2008 | 0.7 | 0.87 | 5.79 | 80.6% |
| 2007 | 0.62 | 0.8 | 5.42 | 77.7% |
| 2006 | 0.58 | 0.76 | 5.18 | 76.1% |
| 2005 | 0.53 | 0.7 | 4.86 | 74.9% |
| 2004 | 0.49 | 0.66 | 4.63 | 74.4% |
| 2003 | 0.44 | 0.64 | 4.54 | 68.9% |
| 2002 | 0.4 | 0.58 | 4.18 | 68.9% |
| 2001 | 0.37 | 0.55 | 4.04 | 66.6% |
| 2000 | 0.35 | 0.5 | 3.75 | 68.8% |
| 1999 | 0.32 | 0.47 | 3.6 | 68.1% |
| 1998 | 0.29 | 0.42 | 3.25 | 68.9% |
| 1997 | 0.27 | 0.39 | 3.1 | 68.8% |
| 1996 | 0.27 | 0.38 | 3.07 | 70.4% |
| 1995 | 0.26 | 0.37 | 3.02 | 71.1% |
| 1994 | 0.24 | 0.34 | 2.8 | 71.7% |
| 1993 | 0.22 | 0.31 | 2.58 | 72.7% |
| 1992 | 0.2 | 0.28 | 2.42 | 72.4% |
| 1991 | 0.17 | 0.25 | 2.19 | 69.1% |
| 1990 | 0.16 | 0.23 | 2.09 | 69.4% |
| 1989 | 0.16 | 0.24 | 2.19 | 68.4% |
| 1988 | 0.15 | 0.22 | 2.06 | 67.8% |
| 1987 | 0.13 | 0.2 | 1.88 | 66.6% |
| 1986 | 0.11 | 0.18 | 1.77 | 62.7% |
| 1985 | 0.1 | 0.17 | 1.65 | 60.9% |
| 1984 | 0.09 | 0.16 | 1.63 | 57.8% |
| 1983 | 0.07 | 0.13 | 1.38 | 51.1% |
| 1982 | 0.06 | 0.14 | 1.47 | 46.5% |
| 1981 | 0.06 | 0.13 | 1.43 | 45.2% |
| 1980 | 0.05 | 0.12 | 1.34 | 41.7% |