
| 2024 | 20.18 | 13.96 | 152.5 | 144.6% |
| 2023 | 18.89 | 13.73 | 151.5 | 137.6% |
| 2022 | 17.49 | 13.26 | 148.2 | 131.9% |
| 2021 | 16.85 | 12.99 | 146.8 | 129.8% |
| 2020 | 15.65 | 12.45 | 142 | 125.7% |
| 2019 | 16.01 | 12.17 | 139.8 | 131.5% |
| 2018 | 18.44 | 11.84 | 137.5 | 155.7% |
| 2017 | 18.53 | 11.29 | 132.8 | 164.2% |
| 2016 | 17.03 | 10.89 | 129.9 | 156.4% |
| 2015 | 14.49 | 10.74 | 130 | 134.9% |
| 2014 | 13.97 | 10.41 | 127.7 | 134.2% |
| 2013 | 13.21 | 9.8 | 121.8 | 134.8% |
| 2012 | 13.67 | 9.4 | 118.5 | 145.4% |
| 2011 | 14.79 | 9.17 | 117 | 161.3% |
| 2010 | 14.59 | 8.96 | 115.8 | 162.8% |
| 2009 | 14.22 | 9.07 | 118.6 | 156.8% |
| 2008 | 13.32 | 8.12 | 107.5 | 164.1% |
| 2007 | 13.56 | 7.9 | 105.9 | 171.7% |
| 2006 | 13.23 | 7.63 | 103.9 | 173.4% |
| 2005 | 12.91 | 7.24 | 100.8 | 178.3% |
| 2004 | 12.09 | 6.35 | 90.4 | 190.3% |
| 2003 | 11.54 | 6.08 | 88.38 | 189.9% |
| 2002 | 10.33 | 5.86 | 86.15 | 176.3% |
| 2001 | 10.58 | 5.54 | 82.14 | 190.9% |
| 2000 | 10.35 | 5.12 | 77.09 | 202.2% |
| 1999 | 9.84 | 4.58 | 69.91 | 215% |
| 1998 | 9.84 | 4.53 | 70.24 | 217.2% |
| 1997 | 9.66 | 4.38 | 68.8 | 220.6% |
| 1996 | 9.54 | 3.86 | 61.41 | 247% |
| 1995 | 9.3 | 3.77 | 60.54 | 247% |
| 1994 | 9.08 | 3.62 | 58.84 | 250.9% |
| 1993 | 9 | 3.41 | 55.48 | 264% |
| 1992 | 8.46 | 3.29 | 53.74 | 257.4% |
| 1991 | 8.22 | 3.17 | 52.91 | 258.9% |
| 1990 | 7.63 | 2.97 | 50.87 | 256.9% |
| 1989 | 7.03 | 2.92 | 51.5 | 240.6% |
| 1988 | 5.65 | 2.66 | 48.27 | 212.6% |
| 1987 | 5.67 | 2.49 | 46.65 | 227.8% |
| 1986 | 4.6 | 2.38 | 46.26 | 193.2% |
| 1985 | 5.53 | 2.36 | 47.68 | 233.7% |
| 1984 | 5.25 | 2.19 | 45.72 | 240.3% |
| 1983 | 0.38 | 2.06 | 44.74 | 18.3% |
| 1982 | 0.31 | 1.68 | 38.02 | 18.7% |
| 1981 | 0.27 | 1.45 | 34.57 | 18.5% |
| 1980 | 0.31 | 1.56 | 39.24 | 19.7% |