Year | Value | 2021 | 80.7 | 2020 | 80.351219512195 | 2019 | 81.404878048781 | 2018 | 81.256097560976 | 2017 | 81.256097560976 | 2016 | 81.156097560976 | 2015 | 80.956097560976 | 2014 | 81.30487804878 | 2013 | 81.00487804878 | 2012 | 80.904878048781 | 2011 | 80.951219512195 | 2010 | 80.40243902439 | 2009 | 80.051219512195 | 2008 | 79.6 | 2007 | 79.448780487805 | 2006 | 79.248780487805 | 2005 | 79.048780487805 | 2004 | 78.746341463415 | 2003 | 78.446341463415 | 2002 | 78.143902439024 | 2001 | 77.992682926829 | 2000 | 77.741463414634 | 1999 | 77.390243902439 | 1998 | 77.190243902439 | 1997 | 77.210975609756 | 1996 | 77.087804878049 | 1995 | 76.836585365854 | 1994 | 76.885365853658 | 1993 | 76.385365853658 | 1992 | 76.434146341463 | 1991 | 76.082926829268 | 1990 | 75.880487804878 | 1989 | 75.582926829268 | 1988 | 75.380487804878 | 1987 | 75.280487804878 | 1986 | 74.929268292683 | 1985 | 74.629268292683 | 1984 | 74.778048780488 | 1983 | 74.378048780488 | 1982 | 74.178048780488 | 1981 | 74.026829268293 | 1980 | 73.675609756098 | 1979 | 73.275609756098 | 1978 | 73.175609756098 | 1977 | 73.224390243902 | 1976 | 72.775609756098 | 1975 | 72.724390243902 | 1974 | 72.524390243902 | 1973 | 72.324390243902 | 1972 | 72.124390243902 | 1971 | 72.273170731707 | 1970 | 71.973170731707 | 1969 | 71.721951219512 | 1968 | 71.724390243903 | 1967 | 72.124390243902 | 1966 | 71.573170731707 | 1965 | 71.624390243902 | 1964 | 71.624390243902 | 1963 | 70.826829268293 | 1962 | 70.926829268293 | 1961 | 70.878048780488 | 1960 | 71.126829268293 |
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