
| 2024 | 2.87 | 9.92 | 117.4 | 28.9% |
| 2023 | 3.05 | 10.07 | 119.1 | 30.3% |
| 2022 | 3.61 | 11.22 | 133.4 | 32.2% |
| 2021 | 3.3 | 11.69 | 139.6 | 28.2% |
| 2020 | 3.12 | 11.13 | 133.1 | 28.1% |
| 2019 | 3.45 | 12.32 | 147.5 | 28% |
| 2018 | 3.82 | 12.84 | 154 | 29.7% |
| 2017 | 3.94 | 13.25 | 159.5 | 29.8% |
| 2016 | 3.97 | 12.93 | 156.2 | 30.7% |
| 2015 | 4.17 | 12.84 | 156.4 | 32.4% |
| 2014 | 4.22 | 12.79 | 157.2 | 33% |
| 2013 | 4.28 | 13.29 | 164 | 32.2% |
| 2012 | 4.39 | 13.1 | 161.8 | 33.5% |
| 2011 | 4.41 | 13 | 160.8 | 33.9% |
| 2010 | 4.63 | 13.7 | 169.4 | 33.8% |
| 2009 | 4.62 | 13.02 | 160.8 | 35.5% |
| 2008 | 4.91 | 13.85 | 170.8 | 35.4% |
| 2007 | 5.08 | 13.58 | 167 | 37.4% |
| 2006 | 5.17 | 14.21 | 173.9 | 36.4% |
| 2005 | 5.14 | 13.98 | 170.3 | 36.8% |
| 2004 | 5.19 | 14.19 | 172.9 | 36.6% |
| 2003 | 5.14 | 14.19 | 172.8 | 36.3% |
| 2002 | 5.19 | 14.2 | 173.1 | 36.5% |
| 2001 | 5.19 | 14.45 | 176.3 | 35.9% |
| 2000 | 5.25 | 14.19 | 173.4 | 37% |
| 1999 | 5.36 | 14.2 | 173.9 | 37.7% |
| 1998 | 5.33 | 14.51 | 176.9 | 36.7% |
| 1997 | 5.67 | 14.57 | 176.9 | 38.9% |
| 1996 | 5.74 | 14.78 | 179.6 | 38.8% |
| 1995 | 5.83 | 14.56 | 177.6 | 40% |
| 1994 | 5.87 | 14.28 | 174.6 | 41.1% |
| 1993 | 6.18 | 14.46 | 177.4 | 42.8% |
| 1992 | 6.65 | 14.55 | 179.8 | 45.7% |
| 1991 | 6.88 | 14.85 | 185 | 46.3% |