Year | Value | 2021 | 65.279 | 2020 | 65.432 | 2019 | 66.677 | 2018 | 66.458 | 2017 | 66.099 | 2016 | 65.096 | 2015 | 64.576 | 2014 | 64.274 | 2013 | 64.027 | 2012 | 63.514 | 2011 | 62.993 | 2010 | 62.408 | 2009 | 61.892 | 2008 | 61.529 | 2007 | 60.909 | 2006 | 60.243 | 2005 | 59.697 | 2004 | 59.216 | 2003 | 58.65 | 2002 | 57.672 | 2001 | 57.344 | 2000 | 56.858 | 1999 | 56.3 | 1998 | 54.818 | 1997 | 55.151 | 1996 | 54.806 | 1995 | 54.087 | 1994 | 53.544 | 1993 | 52.739 | 1992 | 50.32 | 1991 | 49.144 | 1990 | 48.397 | 1989 | 47.61 | 1988 | 46.569 | 1987 | 43.453 | 1986 | 42.909 | 1985 | 38.316 | 1984 | 37.974 | 1983 | 41.38 | 1982 | 40.833 | 1981 | 42.295 | 1980 | 41.72 | 1979 | 41.143 | 1978 | 41.685 | 1977 | 42.044 | 1976 | 41.483 | 1975 | 40.938 | 1974 | 40.397 | 1973 | 39.857 | 1972 | 39.3 | 1971 | 38.76 | 1970 | 38.233 | 1969 | 37.701 | 1968 | 37.214 | 1967 | 36.711 | 1966 | 36.226 | 1965 | 35.702 | 1964 | 35.246 | 1963 | 34.773 | 1962 | 34.297 | 1961 | 33.813 | 1960 | 33.285 |
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