
| 2024 | 4.07 | 1.79 | 33.85 | 227.6% |
| 2023 | 3.68 | 1.58 | 30.19 | 232.7% |
| 2022 | 3.87 | 1.56 | 30.14 | 247.9% |
| 2021 | 3.86 | 1.54 | 30.14 | 250.5% |
| 2020 | 3.73 | 1.32 | 26.05 | 282.6% |
| 2019 | 4.85 | 1.48 | 29.74 | 327% |
| 2018 | 4.79 | 1.44 | 29.37 | 332.9% |
| 2017 | 4.91 | 1.4 | 29.13 | 350.1% |
| 2016 | 4.95 | 1.45 | 30.51 | 341.8% |
| 2015 | 5.08 | 1.42 | 30.26 | 357.5% |
| 2014 | 5.1 | 1.44 | 30.94 | 354.2% |
| 2013 | 5.06 | 1.36 | 29.49 | 371.4% |
| 2012 | 4.98 | 1.32 | 28.81 | 378.2% |
| 2011 | 4.78 | 1.23 | 27.17 | 388.7% |
| 2010 | 4.2 | 1.1 | 24.6 | 381.1% |
| 2009 | 3.8 | 1.04 | 23.53 | 364.4% |
| 2008 | 3.57 | 1.01 | 23.09 | 352.8% |
| 2007 | 3.2 | 1.03 | 23.85 | 310% |
| 2006 | 3.16 | 1.03 | 24.15 | 306.9% |
| 2005 | 2.98 | 0.97 | 23.11 | 305.8% |
| 2004 | 2.86 | 0.94 | 22.73 | 303.3% |
| 2003 | 2.78 | 0.95 | 23.11 | 293.4% |
| 2002 | 2.7 | 0.96 | 23.81 | 281.2% |
| 2001 | 2.74 | 0.96 | 24.06 | 286.5% |
| 2000 | 2.78 | 0.95 | 24.34 | 292.7% |
| 1999 | 2.92 | 0.92 | 23.92 | 317.8% |
| 1998 | 2.8 | 0.99 | 26.16 | 283.5% |
| 1997 | 2.59 | 0.99 | 26.68 | 261.3% |
| 1996 | 2.44 | 0.95 | 26.05 | 257.2% |
| 1995 | 2.23 | 0.91 | 25.29 | 246.7% |
| 1994 | 1.88 | 0.88 | 25.03 | 213.5% |
| 1993 | 1.81 | 0.85 | 24.77 | 212.2% |
| 1992 | 1.77 | 0.82 | 24.24 | 216.7% |
| 1991 | 1.71 | 0.75 | 22.75 | 226.6% |
| 1990 | 1.75 | 0.76 | 23.29 | 230.9% |
| 1989 | 1.61 | 0.77 | 24.17 | 209.4% |
| 1988 | 1.46 | 0.73 | 23.55 | 198.9% |
| 1987 | 1.42 | 0.69 | 22.71 | 205.3% |
| 1986 | 1.23 | 0.72 | 24.06 | 171% |
| 1985 | 0.89 | 0.7 | 23.9 | 127.1% |
| 1984 | 0.83 | 0.69 | 24.26 | 119% |
| 1983 | 0.35 | 0.63 | 22.49 | 55.1% |
| 1982 | 0.34 | 0.62 | 22.84 | 54.7% |
| 1981 | 0.32 | 0.61 | 22.65 | 52.8% |
| 1980 | 0.31 | 0.59 | 22.58 | 52% |