
| 2024 | 4.34 | 4.34 | 122 | 100.1% |
| 2023 | 4.27 | 4.01 | 114.3 | 106.5% |
| 2022 | 4.31 | 3.83 | 110.3 | 112.6% |
| 2021 | 4.03 | 3.62 | 105.6 | 111.4% |
| 2020 | 3.9 | 3.46 | 102.2 | 112.6% |
| 2019 | 4.27 | 3.86 | 115.4 | 110.7% |
| 2018 | 4.22 | 3.75 | 114 | 112.5% |
| 2017 | 4.09 | 3.36 | 103.9 | 121.7% |
| 2016 | 3.96 | 3.22 | 101.4 | 122.8% |
| 2015 | 3.91 | 3.24 | 103.7 | 120.8% |
| 2014 | 3.87 | 3.35 | 109.1 | 115.5% |
| 2013 | 3.8 | 3.23 | 107 | 117.6% |
| 2012 | 3.73 | 3.06 | 103.2 | 121.8% |
| 2011 | 3.7 | 3.02 | 103.5 | 122.4% |
| 2010 | 3.8 | 2.94 | 102.4 | 129.6% |
| 2009 | 3.75 | 2.79 | 99.25 | 134.4% |
| 2008 | 3.82 | 2.72 | 98.71 | 140.4% |
| 2007 | 3.75 | 2.67 | 98.93 | 140.4% |
| 2006 | 3.77 | 2.52 | 95.3 | 149.7% |
| 2005 | 3.69 | 2.33 | 90.17 | 158.2% |
| 2004 | 3.49 | 2.09 | 82.66 | 167.1% |
| 2003 | 3.4 | 2.05 | 82.96 | 165.9% |
| 2002 | 3.34 | 2.05 | 85.23 | 162.8% |
| 2001 | 3.16 | 1.89 | 80.19 | 167.2% |
| 2000 | 3.02 | 1.77 | 76.99 | 171% |
| 1999 | 2.94 | 1.59 | 70.9 | 184.9% |
| 1998 | 3 | 1.6 | 73.14 | 187.5% |
| 1997 | 2.96 | 1.6 | 74.93 | 184.9% |
| 1996 | 2.8 | 1.51 | 72.32 | 185.5% |
| 1995 | 2.65 | 1.42 | 69.64 | 187.3% |
| 1994 | 2.34 | 1.3 | 65.35 | 180.5% |
| 1993 | 2.11 | 1.11 | 57.26 | 190.5% |
| 1992 | 2.09 | 0.96 | 50.97 | 217.6% |
| 1991 | 1.99 | 0.9 | 48.89 | 222.3% |
| 1990 | 1.85 | 0.82 | 45.76 | 227.2% |
| 1989 | 1.89 | 0.82 | 47.51 | 230.1% |
| 1988 | 1.77 | 0.75 | 44.9 | 235.1% |
| 1987 | 1.66 | 0.72 | 43.95 | 232.2% |
| 1986 | 1.64 | 0.72 | 45.56 | 229% |
| 1985 | 1.42 | 0.67 | 43.64 | 213.4% |
| 1984 | 1.3 | 0.59 | 39.92 | 220% |
| 1983 | 0.16 | 0.5 | 34.92 | 32.1% |
| 1982 | 0.06 | 0.44 | 31.98 | 14.2% |
| 1981 | 0.07 | 0.42 | 31.45 | 16.6% |
| 1980 | 0.06 | 0.4 | 31.06 | 15.7% |