
| 2024 | 0.34 | 0.65 | 101.4 | 52.5% |
| 2023 | 0.37 | 0.67 | 103.6 | 55.8% |
| 2022 | 0.47 | 0.74 | 114.9 | 63.6% |
| 2021 | 0.43 | 0.72 | 111.2 | 59.3% |
| 2020 | 0.37 | 0.66 | 100.8 | 56.4% |
| 2019 | 0.41 | 0.71 | 107.3 | 58.4% |
| 2018 | 0.43 | 0.71 | 107.2 | 60.1% |
| 2017 | 0.43 | 0.73 | 108.2 | 59.4% |
| 2016 | 0.41 | 0.71 | 105.6 | 57.6% |
| 2015 | 0.44 | 0.74 | 108.2 | 60.2% |
| 2014 | 0.42 | 0.71 | 103 | 59% |
| 2013 | 0.38 | 0.66 | 96.55 | 57.8% |
| 2012 | 0.43 | 0.72 | 103.6 | 60% |
| 2011 | 0.46 | 0.75 | 107 | 60.9% |
| 2010 | 0.39 | 0.68 | 96.96 | 56.5% |
| 2009 | 0.36 | 0.68 | 95.94 | 53.2% |
| 2008 | 0.38 | 0.76 | 106.1 | 50.1% |
| 2007 | 0.37 | 0.77 | 107.3 | 48.2% |
| 2006 | 0.41 | 0.8 | 110.6 | 51.5% |
| 2005 | 0.49 | 0.78 | 107 | 63.1% |
| 2004 | 0.38 | 0.75 | 102.3 | 50.7% |
| 2003 | 0.38 | 0.76 | 102.8 | 50% |
| 2002 | 0.41 | 0.75 | 101.2 | 55% |
| 2001 | 0.39 | 0.75 | 99.29 | 52.8% |
| 2000 | 0.39 | 0.74 | 97.34 | 52.2% |
| 1999 | 0.35 | 0.74 | 96.44 | 47.9% |
| 1998 | 0.4 | 0.8 | 104 | 49.9% |
| 1997 | 0.4 | 0.89 | 114.7 | 44.9% |
| 1996 | 0.43 | 0.98 | 124.6 | 43.6% |
| 1995 | 0.41 | 0.98 | 123.9 | 41.5% |
| 1994 | 0.37 | 0.9 | 112.2 | 41.3% |
| 1993 | 0.36 | 0.87 | 108.8 | 41.2% |
| 1992 | 0.34 | 0.9 | 111.5 | 37.9% |
| 1991 | 0.35 | 0.93 | 112.9 | 37.1% |
| 1990 | 0.38 | 1.19 | 142 | 31.9% |
| 1989 | 0.42 | 1.3 | 153.5 | 32.3% |
| 1988 | 0.42 | 1.42 | 166.5 | 29.8% |
| 1987 | 0.41 | 1.4 | 164 | 29.5% |
| 1986 | 0.4 | 1.41 | 165.6 | 28.2% |
| 1985 | 0.38 | 1.42 | 167.6 | 26.4% |
| 1984 | 0.39 | 1.38 | 162.8 | 28.2% |
| 1983 | 0.37 | 1.38 | 162.8 | 26.7% |
| 1982 | 0.35 | 1.35 | 159.9 | 25.9% |
| 1981 | 0.31 | 1.3 | 154.2 | 24.2% |
| 1980 | 0.29 | 1.31 | 156.4 | 22.2% |