Year | Value | 2021 | 79.594 | 2020 | 80.034 | 2019 | 80.954 | 2018 | 81.024 | 2017 | 80.925 | 2016 | 80.736 | 2015 | 80.516 | 2014 | 80.299 | 2013 | 80.138 | 2012 | 79.991 | 2011 | 79.871 | 2010 | 79.733 | 2009 | 79.615 | 2008 | 79.433 | 2007 | 79.273 | 2006 | 79.041 | 2005 | 78.785 | 2004 | 78.466 | 2003 | 78.141 | 2002 | 77.778 | 2001 | 77.418 | 2000 | 77.062 | 1999 | 76.733 | 1998 | 76.431 | 1997 | 76.161 | 1996 | 75.904 | 1995 | 75.656 | 1994 | 75.421 | 1993 | 75.184 | 1992 | 74.89 | 1991 | 74.668 | 1990 | 74.57 | 1989 | 73.978 | 1988 | 74.208 | 1987 | 74.094 | 1986 | 73.895 | 1985 | 73.648 | 1984 | 73.325 | 1983 | 72.937 | 1982 | 72.507 | 1981 | 72.07 | 1980 | 71.665 | 1979 | 71.329 | 1978 | 71.03 | 1977 | 70.797 | 1976 | 70.496 | 1975 | 70.108 | 1974 | 69.585 | 1973 | 68.907 | 1972 | 68.155 | 1971 | 67.365 | 1970 | 66.57 | 1969 | 66.113 | 1968 | 65.793 | 1967 | 65.599 | 1966 | 65.401 | 1965 | 65.216 | 1964 | 64.866 | 1963 | 64.356 | 1962 | 63.703 | 1961 | 62.935 | 1960 | 62.092 |
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