
| 2024 | 0.26 | 4.59 | 197.7 | 5.7% |
| 2023 | 0.3 | 4.59 | 196.8 | 6.5% |
| 2022 | 0.34 | 4.74 | 202.2 | 7.2% |
| 2021 | 0.37 | 4.93 | 209.3 | 7.4% |
| 2020 | 0.4 | 4.74 | 200.3 | 8.3% |
| 2019 | 0.41 | 4.75 | 200.8 | 8.6% |
| 2018 | 0.35 | 4.88 | 206.3 | 7.2% |
| 2017 | 0.3 | 4.62 | 195.6 | 6.4% |
| 2016 | 0.39 | 4.93 | 208.9 | 7.9% |
| 2015 | 0.43 | 4.86 | 206.5 | 8.9% |
| 2014 | 0.49 | 4.9 | 208.6 | 10% |
| 2013 | 0.49 | 4.74 | 202.4 | 10.2% |
| 2012 | 0.47 | 4.67 | 199.9 | 10.1% |
| 2011 | 0.48 | 4.73 | 203.2 | 10.2% |
| 2010 | 0.47 | 4.78 | 205.6 | 9.9% |
| 2009 | 0.47 | 4.33 | 186.9 | 10.9% |
| 2008 | 0.47 | 4.39 | 190.3 | 10.6% |
| 2007 | 0.47 | 4.57 | 198.5 | 10.2% |
| 2006 | 0.46 | 4.36 | 190.5 | 10.5% |
| 2005 | 0.47 | 4.28 | 187.4 | 11% |
| 2004 | 0.47 | 4.21 | 185 | 11.1% |
| 2003 | 0.46 | 4.05 | 178.7 | 11.3% |
| 2002 | 0.46 | 3.86 | 170.9 | 12% |
| 2001 | 0.42 | 3.67 | 163.7 | 11.5% |
| 2000 | 0.45 | 3.57 | 159.9 | 12.6% |
| 1999 | 0.44 | 3.33 | 149.9 | 13.3% |
| 1998 | 0.43 | 3.18 | 144.4 | 13.5% |
| 1997 | 0.42 | 3 | 137.3 | 14% |
| 1996 | 0.43 | 2.9 | 133.5 | 15% |
| 1995 | 0.41 | 2.68 | 124.5 | 15.4% |
| 1994 | 0.41 | 2.48 | 116.1 | 16.4% |
| 1993 | 0.4 | 2.31 | 109.3 | 17.2% |
| 1992 | 0.4 | 2.15 | 102.7 | 18.7% |
| 1991 | 0.41 | 2.06 | 99.11 | 20.1% |
| 1990 | 0.46 | 1.99 | 96.47 | 23.2% |
| 1989 | 0.38 | 1.87 | 91.65 | 20.6% |
| 1988 | 0.39 | 1.77 | 87.51 | 22% |
| 1987 | 0.45 | 1.62 | 81.18 | 27.4% |
| 1986 | 0.39 | 1.5 | 75.93 | 25.7% |
| 1985 | 0.42 | 1.42 | 72.53 | 29.5% |
| 1984 | 0.38 | 1.38 | 71.27 | 27.4% |
| 1983 | 0.32 | 1.18 | 61.97 | 27% |
| 1982 | 0.26 | 1.03 | 55.2 | 25.4% |
| 1981 | 0.24 | 1.02 | 55.56 | 23.5% |
| 1980 | 0.2 | 1.07 | 59.4 | 18.5% |