Year | Value | 2021 | 74.536829268293 | 2020 | 74.395121951219 | 2019 | 76.60243902439 | 2018 | 76.648780487805 | 2017 | 75.953658536585 | 2016 | 75.4 | 2015 | 75.40243902439 | 2014 | 75.451219512195 | 2013 | 75.4 | 2012 | 74.90243902439 | 2011 | 75.1 | 2010 | 74.99756097561 | 2009 | 74.446341463415 | 2008 | 74.4 | 2007 | 73.8 | 2006 | 73.895121951219 | 2005 | 73.69756097561 | 2004 | 73.59756097561 | 2003 | 73.241463414634 | 2002 | 73.039024390244 | 2001 | 73.436585365854 | 2000 | 72.946341463415 | 1999 | 72.790243902439 | 1998 | 72.29756097561 | 1997 | 72.446341463415 | 1996 | 72.49512195122 | 1995 | 71.848780487805 | 1994 | 71.692682926829 | 1993 | 71.925292682927 | 1992 | 71.244073170732 | 1991 | 71.84443902439 | 1990 | 71.233804878049 | 1989 | 71.136829268293 | 1988 | 70.81943902439 | 1987 | 70.376609756098 | 1986 | 70.383 | 1985 | 70.082073170732 | 1984 | 70.021756097561 | 1983 | 69.482682926829 | 1982 | 69.95556097561 | 1981 | 69.810487804878 | 1980 | 69.247121951219 | 1979 | 69.650219512195 | 1978 | 69.359146341463 | 1977 | 68.44343902439 | 1976 | 67.74556097561 | 1975 | 66.987780487805 | 1974 | 66.592 | 1973 | 65.93612195122 | 1972 | 65.549146341463 | 1971 | 64.617609756098 | 1970 | 63.719390243902 | 1969 | 63.02656097561 | 1968 | 62.863780487805 | 1967 | 62.127853658537 | 1966 | 61.959853658537 | 1965 | 60.001926829268 | 1964 | 58.985926829268 | 1963 | 56.699341463415 | 1962 | 57.523341463415 | 1961 | 57.799829268293 | 1960 | 56.223048780488 |
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