Year | Value | 2021 | 74.465853658537 | 2020 | 75.568292682927 | 2019 | 76.319512195122 | 2018 | 76.065853658537 | 2017 | 75.817073170732 | 2016 | 76.063414634146 | 2015 | 75.568292682927 | 2014 | 75.763414634146 | 2013 | 75.565853658537 | 2012 | 75.063414634146 | 2011 | 74.858536585366 | 2010 | 74.207317073171 | 2009 | 73.904878048781 | 2008 | 73.70243902439 | 2007 | 73.151219512195 | 2006 | 73.09756097561 | 2005 | 72.648780487805 | 2004 | 72.648780487805 | 2003 | 72.3 | 2002 | 72.348780487805 | 2001 | 72.248780487805 | 2000 | 71.246341463415 | 1999 | 70.677073170732 | 1998 | 70.557804878049 | 1997 | 70.70243902439 | 1996 | 70.328780487805 | 1995 | 69.791707317073 | 1994 | 69.469756097561 | 1993 | 69.101219512195 | 1992 | 69.117073170732 | 1991 | 69.377073170732 | 1990 | 69.315609756098 | 1989 | 69.461707317073 | 1988 | 70.023414634146 | 1987 | 69.651219512195 | 1986 | 69.173414634146 | 1985 | 68.972195121951 | 1984 | 69.025853658537 | 1983 | 68.973658536585 | 1982 | 69.357804878049 | 1981 | 69.139268292683 | 1980 | 69.061707317073 | 1979 | 69.615365853659 | 1978 | 69.393902439024 | 1977 | 69.848048780488 | 1976 | 69.573170731707 | 1975 | 69.29 | 1974 | 69.248048780488 | 1973 | 69.518048780488 | 1972 | 69.664634146341 | 1971 | 69.05243902439 | 1970 | 69.164634146341 | 1969 | 69.314634146342 | 1968 | 69.230243902439 | 1967 | 69.407073170732 | 1966 | 69.82243902439 | 1965 | 69.071219512195 | 1964 | 69.380975609756 | 1963 | 68.874146341463 | 1962 | 67.865853658537 | 1961 | 68.936097560976 | 1960 | 68.003170731707 |
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