Year | Value | 2021 | 83.526829268293 | 2020 | 83.426829268293 | 2019 | 83.226829268293 | 2018 | 82.626829268293 | 2017 | 82.626829268293 | 2016 | 82.275609756098 | 2015 | 82.024390243902 | 2014 | 81.721951219512 | 2013 | 81.270731707317 | 2012 | 80.819512195122 | 2011 | 80.568292682927 | 2010 | 80.117073170732 | 2009 | 79.968292682927 | 2008 | 79.517073170732 | 2007 | 79.119512195122 | 2006 | 78.668292682927 | 2005 | 78.168292682927 | 2004 | 77.665853658537 | 2003 | 77.214634146341 | 2002 | 76.765853658537 | 2001 | 76.412195121951 | 2000 | 75.909756097561 | 1999 | 75.409756097561 | 1998 | 75.00487804878 | 1997 | 74.60243902439 | 1996 | 74.151219512195 | 1995 | 73.7 | 1994 | 73.39756097561 | 1993 | 72.99756097561 | 1992 | 72.49756097561 | 1991 | 72.046341463415 | 1990 | 71.59756097561 | 1989 | 71.048780487805 | 1988 | 70.548780487805 | 1987 | 69.99756097561 | 1986 | 69.446341463415 | 1985 | 68.795121951219 | 1984 | 68.19512195122 | 1983 | 67.546341463415 | 1982 | 67.095121951219 | 1981 | 66.546341463415 | 1980 | 66.046341463415 | 1979 | 65.546341463415 | 1978 | 65.19756097561 | 1977 | 64.9 | 1976 | 64.50243902439 | 1975 | 64.153658536585 | 1974 | 63.804878048781 | 1973 | 63.407317073171 | 1972 | 63.009756097561 | 1971 | 62.612195121951 | 1970 | 62.163414634146 | 1969 | 62.051024390244 | 1968 | 61.559 | 1967 | 61.28812195122 | 1966 | 59.504707317073 | 1965 | 58.240487804878 | 1964 | 57.174780487805 | 1963 | 55.974878048781 | 1962 | 55.519512195122 | 1961 | 54.924 | 1960 | 54.320243902439 |
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