
| 2024 | 3.84 | 3.57 | 78.04 | 107.7% |
| 2023 | 3.49 | 3.5 | 76.88 | 99.7% |
| 2022 | 3.43 | 3.58 | 78.86 | 95.9% |
| 2021 | 3.15 | 3.52 | 77.71 | 89.5% |
| 2020 | 3.04 | 3.19 | 70.67 | 95.2% |
| 2019 | 3.25 | 3.59 | 79.81 | 90.5% |
| 2018 | 3.13 | 3.4 | 76.14 | 92.2% |
| 2017 | 3.05 | 3.52 | 79.39 | 86.9% |
| 2016 | 3.06 | 3.7 | 84.18 | 82.9% |
| 2015 | 2.96 | 3.68 | 84.74 | 80.3% |
| 2014 | 2.93 | 3.62 | 84.13 | 80.9% |
| 2013 | 2.93 | 3.61 | 84.67 | 81.4% |
| 2012 | 3.04 | 3.57 | 84.6 | 85.1% |
| 2011 | 3.13 | 3.5 | 83.8 | 89.4% |
| 2010 | 3.28 | 3.41 | 82.56 | 96.2% |
| 2009 | 3.33 | 3.25 | 79.43 | 102.7% |
| 2008 | 3.47 | 3.37 | 83.29 | 103.1% |
| 2007 | 3.47 | 3.22 | 80.38 | 108% |
| 2006 | 3.58 | 3.07 | 77.47 | 116.6% |
| 2005 | 3.54 | 2.93 | 74.82 | 120.7% |
| 2004 | 3.62 | 2.83 | 72.79 | 128% |
| 2003 | 3.55 | 2.58 | 67.1 | 137.7% |
| 2002 | 3.41 | 2.33 | 61.33 | 146.3% |
| 2001 | 3.52 | 2.48 | 65.83 | 142.1% |
| 2000 | 3.4 | 2.58 | 69.25 | 132.1% |
| 1999 | 3.35 | 2.41 | 65.6 | 138.7% |
| 1998 | 3.21 | 2.47 | 67.82 | 130.2% |
| 1997 | 3.11 | 2.3 | 64.05 | 135.1% |
| 1996 | 2.95 | 2.25 | 63.28 | 131.1% |
| 1995 | 2.76 | 2.12 | 60.33 | 130.3% |
| 1994 | 2.55 | 2.05 | 59.12 | 124.6% |
| 1993 | 2.33 | 2.1 | 61.63 | 110.6% |
| 1992 | 2.18 | 1.92 | 56.96 | 113.4% |
| 1991 | 2.02 | 1.87 | 56.22 | 108.2% |
| 1990 | 1.91 | 1.79 | 54.58 | 106.8% |
| 1989 | 1.91 | 1.88 | 58.26 | 101.8% |
| 1988 | 1.81 | 1.87 | 58.84 | 96.8% |
| 1987 | 1.69 | 1.84 | 58.82 | 91.9% |
| 1986 | 1.71 | 1.84 | 59.63 | 93% |
| 1985 | 1.71 | 1.7 | 56.14 | 100.5% |
| 1984 | 1.74 | 1.77 | 59.3 | 98.1% |
| 1983 | 0.57 | 1.66 | 56.57 | 34.2% |
| 1982 | 0.51 | 1.64 | 56.69 | 30.9% |
| 1981 | 0.45 | 1.57 | 55.33 | 28.8% |
| 1980 | 0.38 | 1.62 | 57.74 | 23.6% |