
| 2024 | 0.85 | 5.57 | 93.88 | 15.3% |
| 2023 | 0.8 | 5.7 | 95.84 | 13.9% |
| 2022 | 0.79 | 5.96 | 99.97 | 13.2% |
| 2021 | 0.87 | 6 | 100.4 | 14.5% |
| 2020 | 0.93 | 5.55 | 92.72 | 16.8% |
| 2019 | 0.9 | 6.2 | 103.1 | 14.5% |
| 2018 | 0.94 | 6.28 | 104.2 | 15% |
| 2017 | 0.88 | 6.29 | 104.2 | 14.1% |
| 2016 | 0.89 | 6.2 | 102.6 | 14.3% |
| 2015 | 1 | 6.25 | 103.1 | 15.9% |
| 2014 | 1.06 | 6.08 | 100.2 | 17.5% |
| 2013 | 1.03 | 6.34 | 104.6 | 16.3% |
| 2012 | 0.96 | 6.77 | 111.9 | 14.2% |
| 2011 | 0.92 | 7.07 | 117.2 | 13.1% |
| 2010 | 0.89 | 7.25 | 120.6 | 12.3% |
| 2009 | 0.81 | 6.99 | 116.7 | 11.6% |
| 2008 | 0.84 | 7.59 | 127.4 | 11.1% |
| 2007 | 0.82 | 7.69 | 130.2 | 10.6% |
| 2006 | 0.88 | 7.78 | 132.5 | 11.3% |
| 2005 | 0.91 | 7.84 | 134 | 11.6% |
| 2004 | 0.94 | 7.75 | 133.3 | 12.1% |
| 2003 | 0.9 | 7.64 | 132.3 | 11.8% |
| 2002 | 0.92 | 7.36 | 128.1 | 12.5% |
| 2001 | 0.91 | 7.27 | 126.9 | 12.5% |
| 2000 | 0.96 | 7.24 | 126.5 | 13.3% |
| 1999 | 1.01 | 7.19 | 125.6 | 14.1% |
| 1998 | 1.1 | 7.1 | 124.1 | 15.4% |
| 1997 | 1.11 | 6.9 | 120.6 | 16.1% |
| 1996 | 1.11 | 6.81 | 119.1 | 16.3% |
| 1995 | 1.08 | 6.8 | 118.4 | 15.9% |
| 1994 | 1.09 | 6.45 | 112.4 | 16.9% |
| 1993 | 1.04 | 6.53 | 114.2 | 16% |
| 1992 | 1.01 | 6.57 | 115 | 15.3% |
| 1991 | 0.97 | 6.56 | 115 | 14.8% |
| 1990 | 0.95 | 6.48 | 113.7 | 14.7% |
| 1989 | 0.95 | 6.42 | 112.7 | 14.7% |
| 1988 | 0.97 | 6.2 | 108.9 | 15.6% |
| 1987 | 0.92 | 6.03 | 106.1 | 15.2% |
| 1986 | 0.95 | 5.81 | 102.2 | 16.3% |
| 1985 | 0.87 | 5.71 | 100.4 | 15.2% |
| 1984 | 0.85 | 5.68 | 99.97 | 15% |
| 1983 | 0.71 | 5.53 | 97.42 | 12.9% |
| 1982 | 0.78 | 5.62 | 99.03 | 14% |
| 1981 | 0.72 | 5.74 | 101.4 | 12.5% |
| 1980 | 0.67 | 5.87 | 104 | 11.4% |