
| 2024 | 0.0072 | 0.03 | 1.36 | 24.5% |
| 2023 | 0.0064 | 0.03 | 1.3 | 23.1% |
| 2022 | 0.0075 | 0.03 | 1.34 | 27.2% |
| 2021 | 0.0076 | 0.03 | 1.34 | 28.3% |
| 2020 | 0.0074 | 0.03 | 1.37 | 27.6% |
| 2019 | 0.0074 | 0.03 | 1.43 | 27.2% |
| 2018 | 0.0066 | 0.02 | 1.26 | 28.3% |
| 2017 | 0.0083 | 0.02 | 1.37 | 33.6% |
| 2016 | 0.0089 | 0.02 | 1.31 | 38.7% |
| 2015 | 0.0093 | 0.02 | 1.23 | 43.9% |
| 2014 | 0.0094 | 0.02 | 1.33 | 42.6% |
| 2013 | 0.009 | 0.02 | 1.33 | 41.6% |
| 2012 | 0.0091 | 0.02 | 1.35 | 42.9% |
| 2011 | 0.009 | 0.02 | 1.39 | 42.7% |
| 2010 | 0.0089 | 0.02 | 1.44 | 41.7% |
| 2009 | 0.0075 | 0.02 | 1.22 | 43% |
| 2008 | 0.0076 | 0.02 | 1.37 | 39.7% |
| 2007 | 0.007 | 0.02 | 1.22 | 42.2% |
| 2006 | 0.0069 | 0.02 | 1.27 | 41.2% |
| 2005 | 0.0066 | 0.02 | 1.26 | 41% |
| 2004 | 0.0065 | 0.02 | 1.38 | 37.8% |
| 2003 | 0.0069 | 0.02 | 1.34 | 42% |
| 2002 | 0.0062 | 0.02 | 1.29 | 40.6% |
| 2001 | 0.0057 | 0.02 | 1.37 | 36.1% |
| 2000 | 0.0064 | 0.02 | 1.47 | 38.6% |
| 1999 | 0.0051 | 0.01 | 1.35 | 34.2% |
| 1998 | 0.0052 | 0.02 | 1.39 | 34.6% |
| 1997 | 0.0047 | 0.01 | 1.39 | 32.2% |
| 1996 | 0.0045 | 0.01 | 1.41 | 30.7% |
| 1995 | 0.0043 | 0.01 | 1.42 | 30% |
| 1994 | 0.0043 | 0.01 | 1.35 | 31.3% |
| 1993 | 0.0042 | 0.01 | 1.25 | 32.5% |
| 1992 | 0.0042 | 0.01 | 1.31 | 31.4% |
| 1991 | 0.0041 | 0.01 | 1.33 | 31% |
| 1990 | 0.0039 | 0.01 | 1.17 | 34.8% |
| 1989 | 0.0035 | 0.01 | 1.12 | 34% |
| 1988 | 0.0033 | 0.0088 | 1.01 | 37.8% |
| 1987 | 0.003 | 0.0088 | 1.06 | 33.9% |
| 1986 | 0.0028 | 0.0086 | 1.08 | 32.3% |
| 1985 | 0.0026 | 0.0089 | 1.17 | 28.8% |
| 1984 | 0.0021 | 0.0078 | 1.07 | 27.1% |
| 1983 | 0.002 | 0.008 | 1.13 | 25.3% |
| 1982 | 0.0015 | 0.0091 | 1.35 | 16.6% |
| 1981 | 0.0013 | 0.01 | 1.53 | 12.9% |
| 1980 | 0.0013 | 0.0094 | 1.5 | 14.1% |