
| 2024 | 0.43 | 0.89 | 100 | 48.7% |
| 2023 | 0.42 | 0.9 | 101.4 | 46.3% |
| 2022 | 0.38 | 0.9 | 102.3 | 42.7% |
| 2021 | 0.36 | 0.89 | 102.2 | 40% |
| 2020 | 0.41 | 0.89 | 102.5 | 45.8% |
| 2019 | 0.42 | 0.98 | 114.2 | 42.6% |
| 2018 | 0.4 | 0.98 | 114.5 | 40.6% |
| 2017 | 0.34 | 0.96 | 113.5 | 35.7% |
| 2016 | 0.35 | 0.97 | 115.8 | 36.1% |
| 2015 | 0.38 | 0.97 | 117.2 | 39% |
| 2014 | 0.42 | 1 | 121.9 | 42.4% |
| 2013 | 0.41 | 1.05 | 130.2 | 38.6% |
| 2012 | 0.4 | 1.03 | 128.8 | 38.8% |
| 2011 | 0.39 | 1.02 | 128.3 | 38.4% |
| 2010 | 0.4 | 1.07 | 136.6 | 37.1% |
| 2009 | 0.41 | 1.04 | 134.9 | 38.8% |
| 2008 | 0.41 | 1.07 | 140 | 38.1% |
| 2007 | 0.41 | 1.04 | 137.8 | 39% |
| 2006 | 0.39 | 1.07 | 142.7 | 36.6% |
| 2005 | 0.35 | 1.04 | 139.9 | 33.3% |
| 2004 | 0.39 | 1.05 | 142.3 | 37% |
| 2003 | 0.4 | 1.05 | 142.9 | 37.8% |
| 2002 | 0.4 | 1.03 | 141.4 | 38.4% |
| 2001 | 0.41 | 1.06 | 146.1 | 39% |
| 2000 | 0.39 | 1.03 | 143.5 | 38% |
| 1999 | 0.4 | 1.04 | 145.2 | 38.1% |
| 1998 | 0.38 | 1.03 | 144.6 | 37% |
| 1997 | 0.38 | 1 | 141 | 37.7% |
| 1996 | 0.35 | 1.01 | 142.4 | 35.2% |
| 1995 | 0.37 | 0.99 | 140.5 | 37.7% |
| 1994 | 0.39 | 0.97 | 138.7 | 39.9% |
| 1993 | 0.36 | 0.97 | 140 | 37.5% |
| 1992 | 0.35 | 1 | 145.3 | 35.5% |
| 1991 | 0.35 | 0.99 | 145.2 | 35% |
| 1990 | 0.35 | 0.96 | 142.3 | 36.4% |
| 1989 | 0.33 | 0.94 | 141.4 | 35.6% |
| 1988 | 0.35 | 0.94 | 142.2 | 37.8% |
| 1987 | 0.34 | 0.92 | 140.9 | 36.9% |
| 1986 | 0.33 | 0.93 | 143.1 | 35.4% |
| 1985 | 0.33 | 0.93 | 143.1 | 35.2% |
| 1984 | 0.28 | 0.85 | 131.5 | 33.1% |
| 1983 | 0.27 | 0.84 | 130.3 | 32.4% |
| 1982 | 0.27 | 0.78 | 121.9 | 34.5% |
| 1981 | 0.27 | 0.81 | 127 | 33.2% |
| 1980 | 0.25 | 0.91 | 144.3 | 27.3% |