
| 2024 | 0.07 | 0.05 | 1.74 | 147.7% |
| 2023 | 0.04 | 0.05 | 1.93 | 70.6% |
| 2022 | 0.04 | 0.05 | 1.82 | 78.6% |
| 2021 | 0.04 | 0.04 | 1.57 | 96.7% |
| 2020 | 0.04 | 0.04 | 1.78 | 88.7% |
| 2019 | 0.04 | 0.04 | 1.83 | 93.3% |
| 2018 | 0.04 | 0.03 | 1.3 | 134.6% |
| 2017 | 0.04 | 0.03 | 1.49 | 124.8% |
| 2016 | 0.03 | 0.03 | 1.59 | 102.1% |
| 2015 | 0.04 | 0.04 | 1.77 | 100% |
| 2014 | 0.05 | 0.03 | 1.74 | 146.2% |
| 2013 | 0.05 | 0.04 | 1.9 | 136.8% |
| 2012 | 0.05 | 0.03 | 1.75 | 154.9% |
| 2011 | 0.02 | 0.02 | 1.37 | 84.2% |
| 2010 | 0.0048 | 0.02 | 1.42 | 20.5% |
| 2009 | 0.0039 | 0.02 | 1.19 | 20.4% |
| 2008 | 0.0037 | 0.02 | 1.05 | 23% |
| 2007 | 0.0035 | 0.01 | 0.98 | 23.9% |
| 2006 | 0.0036 | 0.01 | 0.94 | 26.8% |
| 2005 | 0.0037 | 0.01 | 0.97 | 27.5% |
| 2004 | 0.0048 | 0.01 | 1.07 | 33.7% |
| 2003 | 0.0038 | 0.01 | 1.01 | 29.5% |
| 2002 | 0.0037 | 0.01 | 0.95 | 31.4% |
| 2001 | 0.0033 | 0.01 | 0.93 | 29.8% |
| 2000 | 0.0032 | 0.01 | 0.98 | 28.3% |
| 1999 | 0.0034 | 0.01 | 1.21 | 25.3% |
| 1998 | 0.0037 | 0.01 | 1.35 | 25.4% |
| 1997 | 0.0033 | 0.01 | 1.34 | 23.7% |
| 1996 | 0.0037 | 0.01 | 1.38 | 26.6% |
| 1995 | 0.0035 | 0.01 | 1.42 | 25.1% |
| 1994 | 0.0032 | 0.01 | 1.42 | 23.7% |
| 1993 | 0.0032 | 0.01 | 1.46 | 23.9% |
| 1992 | 0.0027 | 0.01 | 1.43 | 21.5% |
| 1991 | 0.0032 | 0.01 | 1.51 | 24.6% |
| 1990 | 0.0031 | 0.01 | 1.54 | 24.5% |
| 1989 | 0.0035 | 0.01 | 1.6 | 26.9% |
| 1988 | 0.0031 | 0.01 | 1.61 | 25% |
| 1987 | 0.0033 | 0.0089 | 1.18 | 37.4% |
| 1986 | 0.0025 | 0.0082 | 1.12 | 30.5% |
| 1985 | 0.0031 | 0.0097 | 1.36 | 31.5% |
| 1984 | 0.003 | 0.0097 | 1.4 | 31.3% |
| 1983 | 0.0026 | 0.0093 | 1.39 | 28.2% |
| 1982 | 0.00091 | 0.0096 | 1.48 | 9.4% |
| 1981 | 0.00061 | 0.0093 | 1.47 | 6.5% |
| 1980 | 0.0004 | 0.009 | 1.47 | 4.5% |