
| 2024 | 0.26 | 0.66 | 120.6 | 39.5% |
| 2023 | 0.25 | 0.67 | 121.3 | 37.4% |
| 2022 | 0.24 | 0.68 | 124.8 | 34.8% |
| 2021 | 0.24 | 0.73 | 133.6 | 33% |
| 2020 | 0.22 | 0.66 | 121.4 | 33.7% |
| 2019 | 0.23 | 0.68 | 124.6 | 33.3% |
| 2018 | 0.22 | 0.7 | 129.4 | 31.1% |
| 2017 | 0.23 | 0.71 | 129.9 | 32.7% |
| 2016 | 0.23 | 0.68 | 125.8 | 33.1% |
| 2015 | 0.23 | 0.68 | 126 | 33.5% |
| 2014 | 0.24 | 0.66 | 121.9 | 35.6% |
| 2013 | 0.24 | 0.7 | 129.7 | 33.7% |
| 2012 | 0.23 | 0.7 | 129.4 | 33.3% |
| 2011 | 0.23 | 0.73 | 135.3 | 31.5% |
| 2010 | 0.21 | 0.73 | 136 | 29.2% |
| 2009 | 0.21 | 0.71 | 131 | 30.4% |
| 2008 | 0.24 | 0.79 | 146.9 | 30.4% |
| 2007 | 0.22 | 0.78 | 144.6 | 28.3% |
| 2006 | 0.25 | 0.8 | 149.1 | 31.3% |
| 2005 | 0.25 | 0.81 | 149.9 | 30.5% |
| 2004 | 0.25 | 0.79 | 146.4 | 31.4% |
| 2003 | 0.26 | 0.81 | 149.9 | 31.9% |
| 2002 | 0.27 | 0.81 | 150.6 | 33% |
| 2001 | 0.26 | 0.81 | 150.1 | 32% |
| 2000 | 0.25 | 0.77 | 143.1 | 32.4% |
| 1999 | 0.21 | 0.76 | 141.9 | 28% |
| 1998 | 0.2 | 0.77 | 144 | 25.4% |
| 1997 | 0.19 | 0.79 | 146.7 | 24.3% |
| 1996 | 0.2 | 0.81 | 151.2 | 24.9% |
| 1995 | 0.2 | 0.83 | 155.6 | 24% |
| 1994 | 0.21 | 0.78 | 146.3 | 26.7% |
| 1993 | 0.2 | 0.84 | 158.1 | 24.2% |