
| 2024 | 0.03 | 0.21 | 5.18 | 16.1% |
| 2023 | 0.03 | 0.2 | 5.06 | 16.8% |
| 2022 | 0.1 | 0.22 | 5.65 | 48% |
| 2021 | 0.12 | 0.21 | 5.56 | 58.5% |
| 2020 | 0.12 | 0.21 | 5.83 | 59% |
| 2019 | 0.13 | 0.23 | 6.52 | 57.9% |
| 2018 | 0.1 | 0.21 | 6.3 | 48.1% |
| 2017 | 0.08 | 0.18 | 5.54 | 42.8% |
| 2016 | 0.06 | 0.14 | 4.43 | 40.4% |
| 2015 | 0.17 | 0.18 | 5.71 | 95.5% |
| 2014 | 0.64 | 0.33 | 10.95 | 193.5% |
| 2013 | 0.78 | 0.35 | 11.93 | 222.6% |
| 2012 | 0.63 | 0.25 | 8.71 | 253.5% |
| 2011 | 0.8 | 0.29 | 10.37 | 278.1% |
| 2010 | 0.87 | 0.34 | 12.72 | 256.6% |
| 2009 | 0.66 | 0.35 | 13.53 | 189.3% |
| 2008 | 0.66 | 0.32 | 12.61 | 209.5% |
| 2007 | 0.72 | 0.3 | 12.4 | 239.4% |
| 2006 | 0.83 | 0.28 | 12.06 | 291.6% |
| 2005 | 0.88 | 0.28 | 12.47 | 310.8% |
| 2004 | 0.89 | 0.27 | 12.2 | 329.9% |
| 2003 | 0.9 | 0.26 | 11.9 | 352.6% |
| 2002 | 0.92 | 0.22 | 10.69 | 411.2% |
| 2001 | 0.92 | 0.22 | 10.92 | 415.2% |
| 2000 | 0.91 | 0.21 | 10.46 | 445.7% |
| 1999 | 0.82 | 0.13 | 6.68 | 644.9% |
| 1998 | 0.77 | 0.17 | 9.18 | 455.3% |
| 1997 | 0.76 | 0.16 | 8.75 | 484.1% |
| 1996 | 0.73 | 0.15 | 8.76 | 478.5% |
| 1995 | 0.72 | 0.15 | 9 | 476.5% |
| 1994 | 0.71 | 0.14 | 8.42 | 519% |
| 1993 | 0.45 | 0.14 | 9.22 | 315.2% |
| 1992 | 0.38 | 0.17 | 11.62 | 216.6% |
| 1991 | 0.41 | 0.17 | 11.52 | 247.3% |
| 1990 | 0.41 | 0.16 | 11.56 | 253.7% |
| 1989 | 0.41 | 0.15 | 11.49 | 265.1% |
| 1988 | 0.35 | 0.14 | 11.18 | 242.6% |
| 1987 | 0.02 | 0.14 | 11.27 | 13.8% |
| 1986 | 0 | 0.14 | 11.81 | 0% |
| 1985 | 0 | 0.15 | 12.75 | 0% |
| 1984 | 0 | 0.13 | 11.93 | 0% |
| 1983 | 0 | 0.11 | 9.96 | 0% |
| 1982 | 0 | 0.11 | 11.16 | 0% |
| 1981 | 0 | 0.1 | 9.85 | 0% |
| 1980 | 0 | 0.1 | 10.01 | 0% |