Year | Value | 2022 | 75.750304465395 | 2021 | 74.210401099325 | 2020 | 79.206198985894 | 2019 | 79.600372538736 | 2018 | 79.968032349574 | 2017 | 78.258762053283 | 2016 | 76.912130621262 | 2015 | 80.667147903367 | 2014 | 80.799488539762 | 2013 | 80.527161621111 | 2012 | 80.306515575899 | 2011 | 79.520424145744 | 2010 | 79.605442631409 | 2009 | 79.57121322785 | 2008 | 81.593952475145 | 2007 | 81.503418021353 | 2006 | 81.915992303857 | 2005 | 80.370798568167 | 2004 | 79.783634078849 | 2003 | 81.688050488788 | 2002 | 85.712816391051 | 2001 | 88.372254345902 | 2000 | 88.860519395072 | 1999 | 88.115811859285 | 1998 | 85.462616194817 | 1997 | 85.945408246835 | 1996 | 84.948264585886 | 1995 | 84.696337798404 | 1994 | 84.743578811145 | 1993 | 84.791639555935 | 1992 | 83.793000966602 | 1991 | 82.042223433863 | 1990 | 82.363374356897 | 1989 | 82.139360037817 | 1988 | 81.008289380159 | 1987 | 83.262133982373 | 1986 | 82.871899457465 | 1985 | 82.964744125414 | 1984 | 82.668132322129 | 1983 | 83.661449870293 | 1982 | 83.168405597188 | 1981 | 82.436770428016 | 1980 | 88.252136566743 | 1979 | 80.292422075557 | 1978 | 79.597377612329 | 1977 | 81.276184000628 | 1976 | 79.560392377052 | 1975 | 84.598660093541 | 1974 | 86.657465942481 | 1973 | 64.979399646851 | 1972 | 82.292204439855 | 1971 | 83.409939672508 | 1970 | 97.924528301887 | 1969 | 83.765841882921 | 1968 | 83.139377537212 | 1967 | 79.84496124031 | 1966 | 77.846153846154 | 1965 | 79.234972677596 | 1964 | 84.776119402985 | 1963 | 82.403433476395 | 1962 | 83.505154639175 | 1961 | 76.704545454545 | 1960 | 82.758620689655 |
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