Year | Value | 2021 | 69.404 | 2020 | 71.537 | 2019 | 73.8 | 2018 | 73.842 | 2017 | 73.759 | 2016 | 73.519 | 2015 | 73.252 | 2014 | 72.985 | 2013 | 72.725 | 2012 | 72.455 | 2011 | 72.141 | 2010 | 71.817 | 2009 | 71.487 | 2008 | 70.933 | 2007 | 70.374 | 2006 | 69.961 | 2005 | 69.513 | 2004 | 69.032 | 2003 | 68.622 | 2002 | 68.076 | 2001 | 67.545 | 2000 | 67.312 | 1999 | 66.884 | 1998 | 66.662 | 1997 | 66.431 | 1996 | 66.13 | 1995 | 65.885 | 1994 | 65.533 | 1993 | 65.221 | 1992 | 64.86 | 1991 | 64.652 | 1990 | 64.539 | 1989 | 64.576 | 1988 | 64.605 | 1987 | 64.756 | 1986 | 64.975 | 1985 | 63.477 | 1984 | 65.024 | 1983 | 64.901 | 1982 | 64.75 | 1981 | 64.451 | 1980 | 64.174 | 1979 | 63.749 | 1978 | 63.373 | 1977 | 62.921 | 1976 | 62.415 | 1975 | 61.913 | 1974 | 61.354 | 1973 | 60.806 | 1972 | 60.383 | 1971 | 59.913 | 1970 | 59.459 | 1969 | 59.147 | 1968 | 58.84 | 1967 | 58.529 | 1966 | 58.214 | 1965 | 57.826 | 1964 | 57.385 | 1963 | 56.919 | 1962 | 56.306 | 1961 | 55.714 | 1960 | 55.099 |
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