
| 2024 | 3.22 | 1.7 | 59.77 | 189.5% |
| 2023 | 2.92 | 1.6 | 56.38 | 182.9% |
| 2022 | 2.77 | 1.59 | 56.36 | 174% |
| 2021 | 2.39 | 1.44 | 51.06 | 165.9% |
| 2020 | 2.17 | 1.34 | 47.16 | 161.5% |
| 2019 | 2.97 | 1.76 | 60.79 | 169% |
| 2018 | 4.51 | 2.28 | 76.56 | 197.6% |
| 2017 | 5.83 | 2.52 | 82.6 | 231.1% |
| 2016 | 6.46 | 2.57 | 83.63 | 251.1% |
| 2015 | 6.98 | 2.62 | 85.83 | 265.8% |
| 2014 | 6.96 | 2.67 | 88.28 | 260.6% |
| 2013 | 7.03 | 2.71 | 90.61 | 259.6% |
| 2012 | 7.09 | 2.9 | 98.24 | 244.2% |
| 2011 | 7.03 | 2.61 | 89.56 | 268.8% |
| 2010 | 6.78 | 2.63 | 91.18 | 258% |
| 2009 | 7.03 | 2.57 | 90.52 | 273.2% |
| 2008 | 7.15 | 2.62 | 93.5 | 272.8% |
| 2007 | 7.92 | 2.46 | 89.05 | 321.7% |
| 2006 | 8.08 | 2.65 | 97.16 | 305.6% |
| 2005 | 8.07 | 2.5 | 93.47 | 322.3% |
| 2004 | 7.61 | 2.51 | 95.26 | 303.3% |
| 2003 | 6.83 | 2.23 | 86.1 | 306.3% |
| 2002 | 7.4 | 2.46 | 96.66 | 300.9% |
| 2001 | 8.39 | 2.58 | 103.5 | 324.7% |
| 2000 | 8.43 | 2.31 | 94.28 | 364.4% |
| 1999 | 8.11 | 2.24 | 92.92 | 362.6% |
| 1998 | 9.05 | 2.42 | 102.7 | 373.2% |
| 1997 | 8.99 | 2.28 | 98.48 | 394.6% |
| 1996 | 8.36 | 2.2 | 97.23 | 379.2% |
| 1995 | 7.82 | 2.12 | 95.6 | 368.4% |
| 1994 | 7.08 | 2.08 | 95.91 | 339.7% |
| 1993 | 6.63 | 1.97 | 92.78 | 336.1% |
| 1992 | 6.6 | 1.9 | 91.29 | 348% |
| 1991 | 6.63 | 1.9 | 93.72 | 348.5% |
| 1990 | 6.03 | 1.83 | 92.06 | 330.1% |
| 1989 | 5.42 | 1.81 | 93.77 | 298.6% |
| 1988 | 5.22 | 1.7 | 89.93 | 307.5% |
| 1987 | 4.72 | 1.71 | 92.73 | 276.9% |
| 1986 | 4.94 | 1.71 | 95.29 | 289.2% |
| 1985 | 4.58 | 1.59 | 91.26 | 287.4% |
| 1984 | 4.86 | 1.57 | 92.16 | 309.8% |
| 1983 | 0.75 | 1.56 | 94.4 | 47.9% |
| 1982 | 0.77 | 1.64 | 101.5 | 47.1% |
| 1981 | 0.73 | 1.61 | 102.9 | 45.4% |
| 1980 | 0.67 | 1.48 | 97.22 | 44.9% |