
| 2024 | 0.03 | 0.13 | 3.16 | 19.4% |
| 2023 | 0.02 | 0.14 | 3.32 | 13.1% |
| 2022 | 0.1 | 0.15 | 3.79 | 62.5% |
| 2021 | 0.06 | 0.16 | 4.06 | 35.2% |
| 2020 | 0.04 | 0.16 | 4.1 | 26.3% |
| 2019 | 0.07 | 0.16 | 4.25 | 43.3% |
| 2018 | 0.07 | 0.16 | 4.32 | 41.7% |
| 2017 | 0.05 | 0.12 | 3.49 | 41% |
| 2016 | 0.06 | 0.1 | 2.76 | 58.1% |
| 2015 | 0.05 | 0.11 | 3.12 | 47.8% |
| 2014 | 0.06 | 0.09 | 2.77 | 61.8% |
| 2013 | 0.05 | 0.11 | 3.44 | 42% |
| 2012 | 0.04 | 0.13 | 4.36 | 32.3% |
| 2011 | 0.03 | 0.14 | 4.81 | 22.9% |
| 2010 | 0.02 | 0.11 | 3.89 | 20.6% |
| 2009 | 0.01 | 0.09 | 3.14 | 15.8% |
| 2008 | 0.01 | 0.05 | 1.94 | 20.6% |
| 2007 | 0.0088 | 0.03 | 1.02 | 33.4% |
| 2006 | 0.0036 | 0.02 | 0.88 | 16.2% |
| 2005 | 0.0034 | 0.02 | 0.7 | 19.9% |
| 2004 | 0.0033 | 0.01 | 0.54 | 26.3% |
| 2003 | 0.0036 | 0.01 | 0.6 | 26.5% |
| 2002 | 0.0042 | 0.01 | 0.53 | 36.6% |
| 2001 | 0.0041 | 0.01 | 0.61 | 32.6% |
| 2000 | 0.0096 | 0.02 | 0.9 | 53.1% |
| 1999 | 0.0095 | 0.02 | 1.06 | 45.5% |
| 1998 | 0.0096 | 0.02 | 1.1 | 45.6% |
| 1997 | 0.0096 | 0.02 | 1.16 | 44.9% |
| 1996 | 0.0098 | 0.02 | 1.26 | 43.8% |
| 1995 | 0.0089 | 0.02 | 1.32 | 39.5% |
| 1994 | 0.01 | 0.03 | 1.65 | 47.7% |
| 1993 | 0.01 | 0.03 | 1.86 | 46.1% |
| 1992 | 0.01 | 0.03 | 2.11 | 45.9% |
| 1991 | 0.02 | 0.04 | 3.48 | 36.8% |
| 1990 | 0.11 | 0.1 | 8.55 | 110.2% |
| 1989 | 0.11 | 0.1 | 8.77 | 109.5% |
| 1988 | 0.12 | 0.11 | 9.21 | 109.6% |
| 1987 | 0.11 | 0.06 | 5.07 | 189.6% |
| 1986 | 0.12 | 0.03 | 2.99 | 338.9% |
| 1985 | 0.12 | 0.03 | 2.88 | 351.7% |
| 1984 | 0.09 | 0.03 | 3.03 | 278.9% |
| 1983 | 0.09 | 0.03 | 3.09 | 280% |
| 1982 | 0.09 | 0.03 | 2.45 | 334.7% |
| 1981 | 0.09 | 0.02 | 2.08 | 352.4% |
| 1980 | 0.07 | 0.02 | 1.64 | 312.6% |