Year | Value | 2021 | 76.403 | 2020 | 77.881 | 2019 | 77.697 | 2018 | 77.353 | 2017 | 77.694 | 2016 | 77.674 | 2015 | 77.93 | 2014 | 77.407 | 2013 | 77.069 | 2012 | 76.704 | 2011 | 76.41 | 2010 | 76.138 | 2009 | 76.757 | 2008 | 74.773 | 2007 | 74.685 | 2006 | 74.204 | 2005 | 74.814 | 2004 | 74.489 | 2003 | 72.824 | 2002 | 73.863 | 2001 | 72.539 | 2000 | 71.761 | 1999 | 70.668 | 1998 | 71.866 | 1997 | 70.872 | 1996 | 71.93 | 1995 | 71.632 | 1994 | 71.322 | 1993 | 71.242 | 1992 | 70.785 | 1991 | 71.399 | 1990 | 70.401 | 1989 | 71.162 | 1988 | 70.756 | 1987 | 71.243 | 1986 | 70.743 | 1985 | 70.156 | 1984 | 70.163 | 1983 | 70.406 | 1982 | 70.574 | 1981 | 69.896 | 1980 | 69.908 | 1979 | 70.409 | 1978 | 69.447 | 1977 | 69.086 | 1976 | 69.143 | 1975 | 69.179 | 1974 | 68.734 | 1973 | 67.815 | 1972 | 66.831 | 1971 | 67.441 | 1970 | 67.092 | 1969 | 66.655 | 1968 | 66.569 | 1967 | 67.113 | 1966 | 66.511 | 1965 | 66.25 | 1964 | 65.922 | 1963 | 66.04 | 1962 | 65.41 | 1961 | 64.681 | 1960 | 65.116 |
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