Year | Value | 2021 | 74.339024390244 | 2020 | 74.978048780488 | 2019 | 76.282926829268 | 2018 | 75.680487804878 | 2017 | 75.480487804878 | 2016 | 74.670731707317 | 2015 | 74.321951219512 | 2014 | 74.517073170732 | 2013 | 73.914634146341 | 2012 | 73.863414634146 | 2011 | 73.563414634146 | 2010 | 73.268292682927 | 2009 | 72.914634146341 | 2008 | 71.812195121951 | 2007 | 70.9 | 2006 | 71.056097560976 | 2005 | 71.253658536585 | 2004 | 71.960975609756 | 2003 | 72.060975609756 | 2002 | 71.760975609756 | 2001 | 71.658536585366 | 2000 | 72.019512195122 | 1999 | 71.570731707317 | 1998 | 71.219512195122 | 1997 | 70.909024390244 | 1996 | 70.108048780488 | 1995 | 69.006341463415 | 1994 | 68.530243902439 | 1993 | 68.910487804878 | 1992 | 70.234390243902 | 1991 | 70.364146341463 | 1990 | 71.160731707317 | 1989 | 71.425365853659 | 1988 | 71.762195121951 | 1987 | 71.934634146341 | 1986 | 72.080731707317 | 1985 | 70.501219512195 | 1984 | 70.32 | 1983 | 70.777804878049 | 1982 | 70.836829268293 | 1981 | 70.460731707317 | 1980 | 70.482195121951 | 1979 | 70.482195121951 | 1978 | 70.604634146341 | 1977 | 70.809512195122 | 1976 | 70.958048780488 | 1975 | 70.867317073171 | 1974 | 71.244146341463 | 1973 | 71.332195121951 | 1972 | 71.024634146341 | 1971 | 71.735365853658 | 1970 | 70.804390243902 | 1969 | 70.928536585366 | 1968 | 71.313658536585 | 1967 | 71.603902439024 | 1966 | 71.520243902439 | 1965 | 71.32512195122 | 1964 | 71.509024390244 | 1963 | 70.204390243902 | 1962 | 69.095365853659 | 1961 | 70.102682926829 | 1960 | 69.847317073171 |
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