
| 2024 | 0.25 | 0.12 | 4.33 | 205.5% |
| 2023 | 0.25 | 0.12 | 4.28 | 216.4% |
| 2022 | 0.25 | 0.12 | 4.71 | 203.1% |
| 2021 | 0.25 | 0.12 | 4.8 | 206.9% |
| 2020 | 0.26 | 0.13 | 5.2 | 203.6% |
| 2019 | 0.26 | 0.12 | 5.13 | 205.7% |
| 2018 | 0.23 | 0.13 | 5.45 | 176.8% |
| 2017 | 0.21 | 0.12 | 5.16 | 174% |
| 2016 | 0.24 | 0.12 | 5.38 | 202.2% |
| 2015 | 0.25 | 0.12 | 5.7 | 205.6% |
| 2014 | 0.2 | 0.12 | 5.83 | 160.5% |
| 2013 | 0.15 | 0.09 | 4.54 | 164.6% |
| 2012 | 0.16 | 0.11 | 5.54 | 148.4% |
| 2011 | 0.15 | 0.11 | 5.63 | 143.6% |
| 2010 | 0.16 | 0.1 | 5.46 | 161% |
| 2009 | 0.18 | 0.09 | 4.82 | 208.6% |
| 2008 | 0.19 | 0.08 | 4.43 | 247.5% |
| 2007 | 0.2 | 0.08 | 4.6 | 257.1% |
| 2006 | 0.22 | 0.08 | 4.73 | 278.4% |
| 2005 | 0.21 | 0.06 | 3.79 | 338.9% |
| 2004 | 0.22 | 0.06 | 4.02 | 355% |
| 2003 | 0.23 | 0.06 | 4.04 | 377.6% |
| 2002 | 0.25 | 0.06 | 3.92 | 420.8% |
| 2001 | 0.24 | 0.06 | 3.93 | 411.8% |
| 2000 | 0.26 | 0.06 | 4.1 | 447.1% |
| 1999 | 0.26 | 0.06 | 4.04 | 465.2% |
| 1998 | 0.27 | 0.06 | 4.38 | 466.6% |
| 1997 | 0.26 | 0.06 | 4.51 | 449.1% |
| 1996 | 0.24 | 0.06 | 4.42 | 431.7% |
| 1995 | 0.23 | 0.06 | 4.64 | 398.2% |
| 1994 | 0.26 | 0.06 | 4.65 | 465.7% |
| 1993 | 0.29 | 0.05 | 4.41 | 564.6% |
| 1992 | 0.31 | 0.06 | 5.32 | 507.1% |
| 1991 | 0.34 | 0.06 | 5.41 | 562.6% |
| 1990 | 0.36 | 0.06 | 5.54 | 613.6% |
| 1989 | 0.38 | 0.06 | 5.63 | 646.9% |
| 1988 | 0.38 | 0.05 | 4.85 | 774.6% |
| 1987 | 0.37 | 0.05 | 5.1 | 729.8% |
| 1986 | 0.39 | 0.05 | 5.63 | 722.5% |
| 1985 | 0.4 | 0.05 | 5.3 | 817.2% |
| 1984 | 0.34 | 0.05 | 5.17 | 737.3% |
| 1983 | 0.0068 | 0.05 | 5.26 | 14.9% |
| 1982 | 0.0069 | 0.05 | 5.38 | 15% |
| 1981 | 0.0061 | 0.04 | 4.68 | 15.6% |
| 1980 | 0.0046 | 0.04 | 4.67 | 12.2% |