Year | Value | 2021 | 83.163414634146 | 2020 | 83.209756097561 | 2019 | 82.958536585366 | 2018 | 82.758536585366 | 2017 | 82.609756097561 | 2016 | 82.407317073171 | 2015 | 82.30487804878 | 2014 | 82.1 | 2013 | 81.751219512195 | 2012 | 81.451219512195 | 2011 | 81.295121951219 | 2010 | 80.99756097561 | 2009 | 80.795121951219 | 2008 | 80.592682926829 | 2007 | 80.395121951219 | 2006 | 80.343902439024 | 2005 | 80.041463414634 | 2004 | 79.841463414634 | 2003 | 79.390243902439 | 2002 | 78.987804878049 | 2001 | 78.785365853659 | 2000 | 78.634146341463 | 1999 | 78.282926829268 | 1998 | 78.329268292683 | 1997 | 78.142682926829 | 1996 | 78.150487804878 | 1995 | 77.736585365854 | 1994 | 77.689756097561 | 1993 | 77.151707317073 | 1992 | 77.184390243902 | 1991 | 76.980731707317 | 1990 | 76.537317073171 | 1989 | 76.500487804878 | 1988 | 76.220487804878 | 1987 | 76.081707317073 | 1986 | 76.241219512195 | 1985 | 75.916829268293 | 1984 | 76.224390243902 | 1983 | 76.066829268293 | 1982 | 76.010975609756 | 1981 | 75.869024390244 | 1980 | 75.671707317073 | 1979 | 75.413902439024 | 1978 | 75.418536585366 | 1977 | 75.386829268293 | 1976 | 75.039512195122 | 1975 | 74.81756097561 | 1974 | 74.753658536585 | 1973 | 74.442195121951 | 1972 | 74.344634146342 | 1971 | 74.179268292683 | 1970 | 74.088048780488 | 1969 | 73.663414634146 | 1968 | 73.941951219512 | 1967 | 74.066585365854 | 1966 | 73.995365853658 | 1965 | 73.723170731707 | 1964 | 73.595853658537 | 1963 | 73.07756097561 | 1962 | 73.448048780488 | 1961 | 73.550487804878 | 1960 | 73.549756097561 |
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