
| 2024 | 0.38 | 0.29 | 37.15 | 130.2% |
| 2023 | 0.36 | 0.27 | 34.64 | 135.1% |
| 2022 | 0.32 | 0.22 | 29.17 | 146.4% |
| 2021 | 0.32 | 0.24 | 32 | 136.1% |
| 2020 | 0.31 | 0.23 | 31.02 | 135.9% |
| 2019 | 0.29 | 0.25 | 34.45 | 115.5% |
| 2018 | 0.31 | 0.24 | 34.22 | 125.1% |
| 2017 | 0.26 | 0.24 | 33.68 | 111% |
| 2016 | 0.25 | 0.2 | 29.03 | 124% |
| 2015 | 0.12 | 0.13 | 18.71 | 92% |
| 2014 | 0.07 | 0.07 | 10.1 | 105.9% |
| 2013 | 0.07 | 0.06 | 9.61 | 111.3% |
| 2012 | 0.06 | 0.06 | 8.7 | 106.9% |
| 2011 | 0.06 | 0.05 | 7.72 | 118.6% |
| 2010 | 0.04 | 0.05 | 7.37 | 89.6% |
| 2009 | 0.02 | 0.04 | 6.66 | 50.6% |
| 2008 | 0.02 | 0.04 | 5.9 | 58.6% |
| 2007 | 0.02 | 0.03 | 5.39 | 58.2% |
| 2006 | 0.02 | 0.03 | 5.17 | 61.1% |
| 2005 | 0.02 | 0.02 | 4.24 | 72% |
| 2004 | 0.02 | 0.02 | 3.74 | 72.8% |
| 2003 | 0.01 | 0.02 | 3.67 | 68.4% |
| 2002 | 0.02 | 0.02 | 3.42 | 78.7% |
| 2001 | 0.02 | 0.02 | 3.32 | 81.9% |
| 2000 | 0.01 | 0.02 | 3.16 | 85.1% |
| 1999 | 0.01 | 0.0074 | 1.39 | 166.1% |
| 1998 | 0.0095 | 0.0075 | 1.42 | 126.9% |
| 1997 | 0.006 | 0.0076 | 1.47 | 80% |
| 1996 | 0.0052 | 0.007 | 1.39 | 74.6% |
| 1995 | 0.0041 | 0.0062 | 1.26 | 66.3% |
| 1994 | 0.0034 | 0.0054 | 1.13 | 62.2% |
| 1993 | 0.0033 | 0.0054 | 1.15 | 61.2% |
| 1992 | 0.0031 | 0.0051 | 1.12 | 61.6% |
| 1991 | 0.0031 | 0.0049 | 1.11 | 63.1% |
| 1990 | 0.0029 | 0.0045 | 1.04 | 64% |
| 1989 | 0.0023 | 0.0044 | 1.04 | 51.5% |
| 1988 | 0.0017 | 0.0037 | 0.92 | 44.5% |
| 1987 | 0.0018 | 0.0038 | 0.97 | 47.3% |
| 1986 | 0.0028 | 0.0038 | 0.99 | 73.7% |
| 1985 | 0.0029 | 0.0032 | 0.87 | 90.3% |
| 1984 | 0.0032 | 0.003 | 0.83 | 106.3% |
| 1983 | 0.0035 | 0.0035 | 0.99 | 98.8% |
| 1982 | 0.0039 | 0.0035 | 1.02 | 110.5% |
| 1981 | 0.0037 | 0.0036 | 1.06 | 104.1% |
| 1980 | 0.0031 | 0.0065 | 1.99 | 48% |