Year | Value | 2021 | 83.178048780488 | 2020 | 82.331707317073 | 2019 | 83.831707317073 | 2018 | 83.431707317073 | 2017 | 83.282926829268 | 2016 | 83.329268292683 | 2015 | 82.831707317073 | 2014 | 83.229268292683 | 2013 | 83.078048780488 | 2012 | 82.426829268293 | 2011 | 82.475609756098 | 2010 | 81.626829268293 | 2009 | 81.475609756098 | 2008 | 81.175609756098 | 2007 | 80.873170731707 | 2006 | 80.821951219512 | 2005 | 80.170731707317 | 2004 | 79.870731707317 | 2003 | 79.619512195122 | 2002 | 79.568292682927 | 2001 | 79.368292682927 | 2000 | 78.965853658537 | 1999 | 78.717073170732 | 1998 | 78.665853658537 | 1997 | 78.604146341463 | 1996 | 78.120487804878 | 1995 | 77.980731707317 | 1994 | 77.901463414634 | 1993 | 77.546585365854 | 1992 | 77.41 | 1991 | 76.971219512195 | 1990 | 76.83756097561 | 1989 | 76.813658536585 | 1988 | 76.747073170732 | 1987 | 76.728048780488 | 1986 | 76.510487804878 | 1985 | 76.259512195122 | 1984 | 76.295365853659 | 1983 | 75.909024390244 | 1982 | 76.134146341463 | 1981 | 75.528536585366 | 1980 | 75.349268292683 | 1979 | 74.818780487805 | 1978 | 74.295609756098 | 1977 | 74.131951219512 | 1976 | 73.642682926829 | 1975 | 73.318780487805 | 1974 | 72.969756097561 | 1973 | 72.610731707317 | 1972 | 72.818048780488 | 1971 | 71.630243902439 | 1970 | 72.027317073171 | 1969 | 71.05756097561 | 1968 | 71.537804878049 | 1967 | 71.252926829268 | 1966 | 71.05512195122 | 1965 | 70.809268292683 | 1964 | 70.399756097561 | 1963 | 69.681219512195 | 1962 | 69.519024390244 | 1961 | 69.480487804878 | 1960 | 69.109268292683 |
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