
| 2024 | 0.29 | 0.03 | 1.31 | 1097.4% |
| 2023 | 0.28 | 0.03 | 1.34 | 1093.6% |
| 2022 | 0.25 | 0.03 | 1.53 | 884.9% |
| 2021 | 0.24 | 0.03 | 1.58 | 854.5% |
| 2020 | 0.28 | 0.03 | 1.47 | 1110.6% |
| 2019 | 0.29 | 0.02 | 1.44 | 1216% |
| 2018 | 0.3 | 0.02 | 1.45 | 1278.7% |
| 2017 | 0.29 | 0.02 | 1.4 | 1331.4% |
| 2016 | 0.26 | 0.01 | 0.94 | 1832.3% |
| 2015 | 0.28 | 0.01 | 0.98 | 1947% |
| 2014 | 0.28 | 0.01 | 1 | 1942% |
| 2013 | 0.23 | 0.01 | 1 | 1668.3% |
| 2012 | 0.24 | 0.01 | 1 | 1812.7% |
| 2011 | 0.26 | 0.0076 | 0.6 | 3443.2% |
| 2010 | 0.28 | 0.0053 | 0.43 | 5252.1% |
| 2009 | 0.27 | 0.0048 | 0.4 | 5680.6% |
| 2008 | 0.29 | 0.0044 | 0.38 | 6610.1% |
| 2007 | 0.33 | 0.0042 | 0.38 | 7828% |
| 2006 | 0.36 | 0.0038 | 0.35 | 9373.4% |
| 2005 | 0.39 | 0.0037 | 0.36 | 10352.6% |
| 2004 | 0.4 | 0.0035 | 0.35 | 11374.9% |
| 2003 | 0.07 | 0.0033 | 0.35 | 2258% |
| 2002 | 0 | 0.0033 | 0.37 | 0% |
| 2001 | 0 | 0.0034 | 0.38 | 0% |
| 2000 | 0 | 0.0035 | 0.41 | 0% |
| 1999 | 0 | 0.0027 | 0.33 | 0% |
| 1998 | 0 | 0.0027 | 0.34 | 0% |
| 1997 | 0 | 0.0027 | 0.35 | 0% |
| 1996 | 0 | 0.0025 | 0.34 | 0% |
| 1995 | 0 | 0.0025 | 0.35 | 0% |
| 1994 | 0 | 0.0025 | 0.37 | 0% |
| 1993 | 0 | 0.0023 | 0.34 | 0% |
| 1992 | 0 | 0.0047 | 0.73 | 0% |
| 1991 | 0 | 0.0047 | 0.76 | 0% |
| 1990 | 0 | 0.0048 | 0.81 | 0% |
| 1989 | 0 | 0.0023 | 0.4 | 0% |
| 1988 | 0 | 0.0021 | 0.37 | 0% |
| 1987 | 0 | 0.0035 | 0.64 | 0% |
| 1986 | 0 | 0.0039 | 0.74 | 0% |
| 1985 | 0 | 0.0023 | 0.44 | 0% |
| 1984 | 0 | 0.0019 | 0.37 | 0% |
| 1983 | 0 | 0.0039 | 0.78 | 0% |
| 1982 | 0 | 0.0039 | 0.82 | 0% |
| 1981 | 0 | 0.0039 | 0.86 | 0% |
| 1980 | 0 | 0.0041 | 0.91 | 0% |