Year | Value | 2021 | 71.245 | 2020 | 75.044 | 2019 | 75.244 | 2018 | 75.067 | 2017 | 75.118 | 2016 | 75.297 | 2015 | 75.505 | 2014 | 75.644 | 2013 | 75.688 | 2012 | 75.657 | 2011 | 75.575 | 2010 | 75.46 | 2009 | 75.335 | 2008 | 75.209 | 2007 | 75.079 | 2006 | 74.95 | 2005 | 74.818 | 2004 | 74.684 | 2003 | 74.545 | 2002 | 74.381 | 2001 | 74.183 | 2000 | 73.941 | 1999 | 73.644 | 1998 | 73.31 | 1997 | 72.971 | 1996 | 72.656 | 1995 | 72.388 | 1994 | 72.194 | 1993 | 72.072 | 1992 | 72.007 | 1991 | 71.984 | 1990 | 71.978 | 1989 | 71.975 | 1988 | 71.959 | 1987 | 71.918 | 1986 | 71.853 | 1985 | 71.754 | 1984 | 71.622 | 1983 | 71.453 | 1982 | 71.292 | 1981 | 71.095 | 1980 | 70.904 | 1979 | 70.63 | 1978 | 70.407 | 1977 | 70.137 | 1976 | 69.808 | 1975 | 69.404 | 1974 | 68.924 | 1973 | 68.386 | 1972 | 67.826 | 1971 | 67.275 | 1970 | 66.75 | 1969 | 66.282 | 1968 | 65.858 | 1967 | 65.462 | 1966 | 65.077 | 1965 | 64.695 | 1964 | 64.302 | 1963 | 63.483 | 1962 | 63.484 | 1961 | 62.906 | 1960 | 62.651 |
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