Year | Value | 2021 | 73.282926829268 | 2020 | 75.185365853658 | 2019 | 75.387804878049 | 2018 | 74.782926829268 | 2017 | 74.629268292683 | 2016 | 74.580487804878 | 2015 | 74.480487804878 | 2014 | 74.124390243902 | 2013 | 73.982926829268 | 2012 | 73.778048780488 | 2011 | 73.575609756098 | 2010 | 73.482926829268 | 2009 | 73.080487804878 | 2008 | 72.419512195122 | 2007 | 71.019512195122 | 2006 | 70.865853658537 | 2005 | 71.356097560976 | 2004 | 72.026829268293 | 2003 | 71.265853658537 | 2002 | 70.960975609756 | 2001 | 70.760975609756 | 2000 | 70.314634146342 | 1999 | 69.742926829268 | 1998 | 69.012195121951 | 1997 | 69.349268292683 | 1996 | 68.776585365854 | 1995 | 66.391219512195 | 1994 | 65.664390243903 | 1993 | 66.722682926829 | 1992 | 68.396097560976 | 1991 | 69.03243902439 | 1990 | 69.273170731707 | 1989 | 70.155365853659 | 1988 | 70.615365853659 | 1987 | 70.692926829268 | 1986 | 70.62243902439 | 1985 | 69.291463414634 | 1984 | 69.162926829268 | 1983 | 69.119024390244 | 1982 | 69.328292682927 | 1981 | 68.786341463415 | 1980 | 68.808536585366 | 1979 | 68.495609756098 | 1978 | 68.987804878049 | 1977 | 69.104634146341 | 1976 | 69.047804878049 | 1975 | 68.925365853659 | 1974 | 69.740975609756 | 1973 | 69.813414634146 | 1972 | 69.878780487805 | 1971 | 70.164634146341 | 1970 | 69.835365853659 | 1969 | 69.796829268293 | 1968 | 70.042926829268 | 1967 | 70.393902439024 | 1966 | 70.707317073171 | 1965 | 70.726585365854 | 1964 | 71.028048780488 | 1963 | 69.829024390244 | 1962 | 69.430487804878 | 1961 | 70.03243902439 | 1960 | 69.786829268293 |
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