Year | Value | 2021 | 69.361219512195 | 2020 | 71.338780487805 | 2019 | 73.083902439024 | 2018 | 72.662195121951 | 2017 | 72.451463414634 | 2016 | 71.651219512195 | 2015 | 71.183414634146 | 2014 | 70.743658536585 | 2013 | 70.578780487805 | 2012 | 70.072195121951 | 2011 | 69.683902439024 | 2010 | 68.841219512195 | 2009 | 68.684634146341 | 2008 | 67.949268292683 | 2007 | 67.586829268293 | 2006 | 66.72756097561 | 2005 | 65.529756097561 | 2004 | 65.470975609756 | 2003 | 65.02756097561 | 2002 | 65.128780487805 | 2001 | 65.383414634146 | 2000 | 65.483658536585 | 1999 | 65.982195121951 | 1998 | 67.029756097561 | 1997 | 66.698780487805 | 1996 | 65.854146341463 | 1995 | 64.690731707317 | 1994 | 64.467073170732 | 1993 | 64.935853658537 | 1992 | 66.873170731707 | 1991 | 68.474390243902 | 1990 | 68.886097560976 | 1989 | 69.171707317073 | 1988 | 69.464390243902 | 1987 | 69.44 | 1986 | 69.389756097561 | 1985 | 67.856829268293 | 1984 | 67.202682926829 | 1983 | 67.652682926829 | 1982 | 67.806097560976 | 1981 | 67.263902439024 | 1980 | 67.033902439024 | 1979 | 67.114390243902 | 1978 | 67.390975609756 | 1977 | 67.376341463415 | 1976 | 67.48756097561 | 1975 | 67.723902439024 | 1974 | 68.320243902439 | 1973 | 68.294634146341 | 1972 | 68.308536585366 | 1971 | 68.376585365854 | 1970 | 68.133658536585 | 1969 | 66.876292682927 | 1968 | 67.489365853659 | 1967 | 67.593804878049 | 1966 | 67.901195121951 | 1965 | 67.887756097561 | 1964 | 68.367170731707 | 1963 | 67.757170731707 | 1962 | 67.300512195122 | 1961 | 67.630951219512 | 1960 | 67.465219512195 |
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