Year | Value | 2021 | 82.324390243902 | 2020 | 82.175609756098 | 2019 | 82.826829268293 | 2018 | 82.675609756098 | 2017 | 82.575609756098 | 2016 | 82.573170731707 | 2015 | 82.321951219512 | 2014 | 82.719512195122 | 2013 | 82.219512195122 | 2012 | 81.968292682927 | 2011 | 82.114634146342 | 2010 | 81.663414634146 | 2009 | 81.414634146341 | 2008 | 81.214634146341 | 2007 | 81.112195121951 | 2006 | 80.812195121951 | 2005 | 80.163414634146 | 2004 | 80.163414634146 | 2003 | 79.114634146342 | 2002 | 79.260975609756 | 2001 | 79.158536585366 | 2000 | 79.056097560976 | 1999 | 78.756097560976 | 1998 | 78.604878048781 | 1997 | 78.30487804878 | 1996 | 77.953658536585 | 1995 | 77.751219512195 | 1994 | 77.648780487805 | 1993 | 77.3 | 1992 | 77.1 | 1991 | 76.848780487805 | 1990 | 76.6 | 1989 | 76.348780487805 | 1988 | 76.1 | 1987 | 75.8 | 1986 | 75.6 | 1985 | 75.3 | 1984 | 75 | 1983 | 74.8 | 1982 | 74.5 | 1981 | 74.3 | 1980 | 74.051219512195 | 1979 | 73.851219512195 | 1978 | 73.60243902439 | 1977 | 73.351219512195 | 1976 | 73.10243902439 | 1975 | 72.853658536585 | 1974 | 72.604878048781 | 1973 | 72.356097560976 | 1972 | 72.107317073171 | 1971 | 71.907317073171 | 1970 | 71.658536585366 | 1969 | 71.458536585366 | 1968 | 71.309756097561 | 1967 | 71.160975609756 | 1966 | 70.960975609756 | 1965 | 70.812195121951 | 1964 | 70.663414634146 | 1963 | 70.514634146342 | 1962 | 70.314634146342 | 1961 | 70.117073170732 | 1960 | 69.868292682927 |
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