Year | Value | 2021 | 72.730731707317 | 2020 | 74.478048780488 | 2019 | 75.936585365854 | 2018 | 75.890243902439 | 2017 | 75.539024390244 | 2016 | 75.687804878049 | 2015 | 75.287804878049 | 2014 | 75.336585365854 | 2013 | 75.185365853658 | 2012 | 74.836585365854 | 2011 | 74.536585365854 | 2010 | 74.336585365854 | 2009 | 73.985365853658 | 2008 | 73.885365853658 | 2007 | 73.631707317073 | 2006 | 73.385365853658 | 2005 | 72.834146341463 | 2004 | 72.682926829268 | 2003 | 72.436585365854 | 2002 | 72.285365853659 | 2001 | 72.234146341463 | 2000 | 71.582926829268 | 1999 | 69.71543902439 | 1998 | 71.187292682927 | 1997 | 71.584365853658 | 1996 | 71.485243902439 | 1995 | 71.689487804878 | 1994 | 71.250658536585 | 1993 | 70.96556097561 | 1992 | 70.800926829268 | 1991 | 70.617707317073 | 1990 | 70.229219512195 | 1989 | 69.770780487805 | 1988 | 69.515707317073 | 1987 | 69.093487804878 | 1986 | 68.904 | 1985 | 68.780804878049 | 1984 | 68.378341463415 | 1983 | 68.284902439024 | 1982 | 68.668292682927 | 1981 | 68.725219512195 | 1980 | 68.790634146342 | 1979 | 68.598902439024 | 1978 | 68.673756097561 | 1977 | 68.746731707317 | 1976 | 68.455292682927 | 1975 | 68.182243902439 | 1974 | 68.005682926829 | 1973 | 67.527390243902 | 1972 | 67.11443902439 | 1971 | 66.52943902439 | 1970 | 66.095463414634 | 1969 | 65.641097560976 | 1968 | 65.632292682927 | 1967 | 65.418 | 1966 | 65.784682926829 | 1965 | 65.094170731707 | 1964 | 64.786390243902 | 1963 | 64.892365853659 | 1962 | 64.478829268293 | 1961 | 64.057414634146 | 1960 | 63.934 |
|