Year | Value | 2021 | 76.463 | 2020 | 76.989 | 2019 | 79.282 | 2018 | 79.184 | 2017 | 79.047 | 2016 | 78.86 | 2015 | 78.644 | 2014 | 78.407 | 2013 | 78.123 | 2012 | 78.064 | 2011 | 78.092 | 2010 | 77.936 | 2009 | 77.781 | 2008 | 77.653 | 2007 | 77.549 | 2006 | 76.816 | 2005 | 76.621 | 2004 | 76.376 | 2003 | 76.142 | 2002 | 75.89 | 2001 | 75.639 | 2000 | 75.404 | 1999 | 75.183 | 1998 | 74.99 | 1997 | 73.904 | 1996 | 74.592 | 1995 | 74.362 | 1994 | 74.131 | 1993 | 73.939 | 1992 | 73.715 | 1991 | 73.378 | 1990 | 73.144 | 1989 | 72.88 | 1988 | 72.641 | 1987 | 72.352 | 1986 | 71.95 | 1985 | 71.656 | 1984 | 71.502 | 1983 | 71.296 | 1982 | 71.023 | 1981 | 70.73 | 1980 | 70.478 | 1979 | 69.584 | 1978 | 69.309 | 1977 | 69.121 | 1976 | 68.704 | 1975 | 68.328 | 1974 | 67.769 | 1973 | 67.14 | 1972 | 66.422 | 1971 | 65.618 | 1970 | 64.824 | 1969 | 63.923 | 1968 | 62.946 | 1967 | 61.972 | 1966 | 60.998 | 1965 | 60.019 | 1964 | 58.983 | 1963 | 57.844 | 1962 | 56.671 | 1961 | 55.634 | 1960 | 54.439 |
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