
| 2024 | 0.52 | 0.4 | 32.01 | 131.4% |
| 2023 | 0.57 | 0.37 | 30.52 | 152.6% |
| 2022 | 0.65 | 0.35 | 29.24 | 183.8% |
| 2021 | 0.71 | 0.32 | 27.13 | 218.7% |
| 2020 | 0.66 | 0.27 | 22.89 | 245.3% |
| 2019 | 0.69 | 0.33 | 27.96 | 210.7% |
| 2018 | 0.77 | 0.33 | 28.41 | 236.6% |
| 2017 | 0.85 | 0.32 | 28.19 | 265.6% |
| 2016 | 0.86 | 0.3 | 27.2 | 282% |
| 2015 | 0.9 | 0.29 | 26.23 | 311.1% |
| 2014 | 0.93 | 0.28 | 25.38 | 336.2% |
| 2013 | 0.9 | 0.27 | 25.38 | 330.4% |
| 2012 | 0.79 | 0.27 | 25.5 | 293.3% |
| 2011 | 0.69 | 0.22 | 21.61 | 309.2% |
| 2010 | 0.64 | 0.22 | 21.26 | 294.5% |
| 2009 | 0.57 | 0.21 | 21.17 | 269% |
| 2008 | 0.66 | 0.22 | 21.84 | 305.6% |
| 2007 | 0.64 | 0.21 | 21.6 | 306.7% |
| 2006 | 0.61 | 0.19 | 20.44 | 311.2% |
| 2005 | 0.56 | 0.18 | 18.89 | 314.9% |
| 2004 | 0.47 | 0.18 | 19.5 | 261% |
| 2003 | 0.35 | 0.17 | 19.16 | 202.6% |
| 2002 | 0.31 | 0.12 | 13.94 | 246.9% |
| 2001 | 0.26 | 0.11 | 12.87 | 233.4% |
| 2000 | 0.2 | 0.14 | 15.74 | 149.7% |
| 1999 | 0.17 | 0.13 | 15.32 | 133.2% |
| 1998 | 0.21 | 0.12 | 13.95 | 179.6% |
| 1997 | 0.2 | 0.13 | 15.35 | 161.1% |
| 1996 | 0.2 | 0.11 | 13.87 | 181.1% |
| 1995 | 0.2 | 0.12 | 14.61 | 170.3% |
| 1994 | 0.17 | 0.1 | 12.78 | 176.5% |
| 1993 | 0.16 | 0.09 | 11.52 | 181.3% |
| 1992 | 0.17 | 0.09 | 11.95 | 186.3% |
| 1991 | 0.16 | 0.08 | 11.15 | 198.8% |
| 1990 | 0.16 | 0.08 | 11.72 | 193.6% |
| 1989 | 0.16 | 0.08 | 11.25 | 201.5% |
| 1988 | 0.15 | 0.07 | 10 | 215.8% |
| 1987 | 0.14 | 0.06 | 8.85 | 236.4% |
| 1986 | 0.14 | 0.06 | 9.19 | 230.6% |
| 1985 | 0.14 | 0.06 | 9.21 | 237% |
| 1984 | 0.15 | 0.07 | 10.56 | 219.1% |
| 1983 | 0.09 | 0.07 | 11.25 | 127.8% |
| 1982 | 0.09 | 0.07 | 10.98 | 129.1% |
| 1981 | 0.08 | 0.08 | 13.16 | 99.3% |
| 1980 | 0.08 | 0.07 | 11.65 | 116% |