Year | Value | 2021 | 82.795121951219 | 2020 | 82.19512195122 | 2019 | 83.49756097561 | 2018 | 83.346341463415 | 2017 | 82.946341463415 | 2016 | 83.243902439024 | 2015 | 82.543902439024 | 2014 | 83.090243902439 | 2013 | 82.690243902439 | 2012 | 82.239024390244 | 2011 | 82.187804878049 | 2010 | 82.036585365854 | 2009 | 81.636585365854 | 2008 | 81.485365853658 | 2007 | 81.434146341463 | 2006 | 81.282926829268 | 2005 | 80.782926829268 | 2004 | 80.780487804878 | 2003 | 79.982926829268 | 2002 | 80.229268292683 | 2001 | 80.126829268293 | 2000 | 79.778048780488 | 1999 | 79.424390243902 | 1998 | 78.975609756098 | 1997 | 78.824390243902 | 1996 | 78.521951219512 | 1995 | 78.170731707317 | 1994 | 77.921951219512 | 1993 | 77.721951219512 | 1992 | 77.419512195122 | 1991 | 77.019512195122 | 1990 | 76.970731707317 | 1989 | 76.819512195122 | 1988 | 76.370731707317 | 1987 | 76.219512195122 | 1986 | 75.770731707317 | 1985 | 75.470731707317 | 1984 | 75.389512195122 | 1983 | 74.640243902439 | 1982 | 74.814634146342 | 1981 | 74.353902439024 | 1980 | 73.943170731707 | 1979 | 74.002682926829 | 1978 | 73.693170731707 | 1977 | 73.364634146342 | 1976 | 72.991951219512 | 1975 | 72.647317073171 | 1974 | 72.734390243902 | 1973 | 72.026341463415 | 1972 | 72.075365853659 | 1971 | 71.806829268293 | 1970 | 71.558780487805 | 1969 | 70.811951219512 | 1968 | 70.78 | 1967 | 70.956585365854 | 1966 | 70.926097560976 | 1965 | 70.171707317073 | 1964 | 70.311707317073 | 1963 | 69.248048780488 | 1962 | 69.149756097561 | 1961 | 69.760243902439 | 1960 | 69.123902439024 |
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