Year | Value | 2021 | 83.441463414634 | 2020 | 84.465853658537 | 2019 | 83.595121951219 | 2018 | 83.29756097561 | 2017 | 83.095121951219 | 2016 | 82.846341463415 | 2015 | 82.743902439024 | 2014 | 82.49512195122 | 2013 | 82.246341463415 | 2012 | 81.99512195122 | 2011 | 81.743902439024 | 2010 | 81.541463414634 | 2009 | 81.241463414634 | 2008 | 80.790243902439 | 2007 | 80.441463414634 | 2006 | 80.141463414634 | 2005 | 79.990243902439 | 2004 | 79.490243902439 | 2003 | 79.039024390244 | 2002 | 78.551219512195 | 2001 | 78.251219512195 | 2000 | 77.951219512195 | 1999 | 77.551219512195 | 1998 | 77.3 | 1997 | 76.89756097561 | 1996 | 76.595121951219 | 1995 | 76.295121951219 | 1994 | 76.19756097561 | 1993 | 76.046341463415 | 1992 | 75.946341463415 | 1991 | 75.646341463415 | 1990 | 75.295121951219 | 1989 | 74.946341463415 | 1988 | 74.69756097561 | 1987 | 74.548780487805 | 1986 | 74.246341463415 | 1985 | 73.890243902439 | 1984 | 73.290243902439 | 1983 | 73.036585365854 | 1982 | 72.687804878049 | 1981 | 72.587804878049 | 1980 | 72.190243902439 | 1979 | 71.639219512195 | 1978 | 71.546756097561 | 1977 | 71.371121951219 | 1976 | 71.165073170732 | 1975 | 70.78343902439 | 1974 | 70.201341463415 | 1973 | 69.739804878049 | 1972 | 69.346780487805 | 1971 | 69.188341463415 | 1970 | 68.913121951219 | 1969 | 68.686268292683 | 1968 | 68.288268292683 | 1967 | 68.119317073171 | 1966 | 67.797 | 1965 | 67.512512195122 | 1964 | 67.074390243902 | 1963 | 66.714707317073 | 1962 | 66.285756097561 | 1961 | 65.517951219512 | 1960 | 64.694682926829 |
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