Year | Value | 2021 | 58.925 | 2020 | 59.27325 | 2019 | 59.8983 | 2018 | 59.71 | 2017 | 59.185 | 2016 | 59.2625 | 2015 | 58.791275 | 2014 | 60.8 | 2013 | 60.19 | 2012 | 60.45 | 2011 | 62.475 | 2010 | 60.525 | 2009 | 60.775 | 2008 | 60.05 | 2007 | 57.65 | 2006 | 58.675 | 2005 | 58.3 | 2004 | 56.725 | 2003 | 56.65 | 2002 | 56.9 | 2001 | 57.3 | 2000 | 57.025 | 1999 | 57.35 | 1998 | 59.15 | 1997 | 59.125 | 1996 | 58.05 | 1995 | 57.975 | 1994 | 59.125 | 1993 | 63.325 | 1992 | 63.475 | 1991 | 63.7 | 1990 | 64.025 | 1989 | 63.625 | 1988 | 64 | 1987 | 64.45 | 1986 | 64.85 | 1985 | 65.025 | 1984 | 65.3 | 1983 | 64.825 | 1982 | 65.75 | 1981 | 65.925 | 1980 | 65.975 | 1979 | 66.05 | 1978 | 66.075 | 1977 | 65.925 | 1976 | 66.425 | 1975 | 66.25 | 1974 | 66.025 | 1973 | 66.325 | 1972 | 66.275 | 1971 | 66.175 | 1970 | 66.525 | 1969 | 66.95 | 1968 | 67.35 | 1967 | 67.125 | 1966 | 67.15 | 1965 | 67.325 | 1964 | 68.15 | 1963 | 68.6 | 1962 | 69.325 | 1961 | 70.175 |
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