Year | Value | 2021 | 69.476744186047 | 2020 | 69.476744186047 | 2019 | 69.593023255814 | 2018 | 69.825581395349 | 2017 | 70 | 2016 | 70.232558139535 | 2015 | 70.46511627907 | 2014 | 70.697674418605 | 2013 | 70.857354651163 | 2012 | 70.930232558139 | 2011 | 70.988372093023 | 2010 | 70.990889534884 | 2009 | 71.162790697674 | 2008 | 71.104651162791 | 2007 | 71.104651162791 | 2006 | 71.104651162791 | 2005 | 71.162790697674 | 2004 | 71.162790697674 | 2003 | 71.162790697674 | 2002 | 71.162790697674 | 2001 | 71.162790697674 | 2000 | 71.104651162791 | 1999 | 71.104651162791 | 1998 | 71.104651162791 | 1997 | 71.104651162791 | 1996 | 71.046511627907 | 1995 | 71.046511627907 | 1994 | 71.046511627907 | 1993 | 71.046511627907 | 1992 | 71.104651162791 | 1991 | 71.337209302326 | 1990 | 71.976744186047 | 1989 | 73.488372093023 | 1988 | 74.709302325581 | 1987 | 75.988372093023 | 1986 | 77.267441860465 | 1985 | 74.651162790698 | 1984 | 73.779069767442 | 1983 | 74.883720930233 | 1982 | 74.767441860465 | 1981 | 74.651162790698 | 1980 | 75.058139534884 | 1979 | 77.906976744186 | 1978 | 80.988372093023 | 1977 | 80.988372093023 | 1976 | 79.709302325581 | 1975 | 76.337209302326 | 1974 | 86.162790697674 | 1973 | 87.96511627907 | 1972 | 87.96511627907 | 1971 | 86.860465116279 | 1970 | 86.860465116279 | 1969 | 86.860465116279 | 1968 | 87.093023255814 | 1967 | 87.03488372093 | 1966 | 86.802325581395 | 1965 | 86.279069767442 | 1964 | 85.872093023256 | 1963 | 85.697674418605 | 1962 | 85.930232558139 | 1961 | 85.348837209302 |
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