Year | Value | 2021 | 76.329268292683 | 2020 | 76.980487804878 | 2019 | 78.787804878049 | 2018 | 78.639024390244 | 2017 | 78.539024390244 | 2016 | 78.539024390244 | 2015 | 78.690243902439 | 2014 | 78.841463414634 | 2013 | 78.741463414634 | 2012 | 78.741463414634 | 2011 | 78.641463414634 | 2010 | 78.541463414634 | 2009 | 78.390243902439 | 2008 | 78.039024390244 | 2007 | 77.987804878049 | 2006 | 77.687804878049 | 2005 | 77.487804878049 | 2004 | 77.487804878049 | 2003 | 77.036585365854 | 2002 | 76.936585365854 | 2001 | 76.836585365854 | 2000 | 76.636585365854 | 1999 | 76.582926829268 | 1998 | 76.580487804878 | 1997 | 76.429268292683 | 1996 | 76.026829268293 | 1995 | 75.621951219512 | 1994 | 75.619512195122 | 1993 | 75.419512195122 | 1992 | 75.617073170732 | 1991 | 75.365853658537 | 1990 | 75.214634146341 | 1989 | 75.017073170732 | 1988 | 74.765853658537 | 1987 | 74.765853658537 | 1986 | 74.614634146342 | 1985 | 74.563414634146 | 1984 | 74.563414634146 | 1983 | 74.463414634146 | 1982 | 74.360975609756 | 1981 | 74.009756097561 | 1980 | 73.609756097561 | 1979 | 73.80487804878 | 1978 | 73.356097560976 | 1977 | 73.256097560976 | 1976 | 72.856097560976 | 1975 | 72.604878048781 | 1974 | 71.956097560976 | 1973 | 71.356097560976 | 1972 | 71.156097560976 | 1971 | 71.107317073171 | 1970 | 70.807317073171 | 1969 | 70.507317073171 | 1968 | 69.951219512195 | 1967 | 70.560975609756 | 1966 | 70.212195121951 | 1965 | 70.214634146341 | 1964 | 70.165853658537 | 1963 | 69.917073170732 | 1962 | 70.119512195122 | 1961 | 70.270731707317 | 1960 | 69.770731707317 |
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