Year | Value | 2021 | 72.541 | 2020 | 74.757 | 2019 | 78.002 | 2018 | 77.966 | 2017 | 77.924 | 2016 | 77.916 | 2015 | 77.687 | 2014 | 77.446 | 2013 | 77.246 | 2012 | 77.061 | 2011 | 76.608 | 2010 | 76.269 | 2009 | 74.681 | 2008 | 74.612 | 2007 | 74.461 | 2006 | 74.48 | 2005 | 74.396 | 2004 | 74.329 | 2003 | 74.14 | 2002 | 73.869 | 2001 | 73.808 | 2000 | 73.466 | 1999 | 73.184 | 1998 | 72.97 | 1997 | 72.415 | 1996 | 72.191 | 1995 | 71.99 | 1994 | 71.385 | 1993 | 71.165 | 1992 | 70.656 | 1991 | 70.189 | 1990 | 69.782 | 1989 | 69.156 | 1988 | 68.58 | 1987 | 67.887 | 1986 | 67.014 | 1985 | 66.272 | 1984 | 65.254 | 1983 | 64.217 | 1982 | 62.96 | 1981 | 61.646 | 1980 | 60.447 | 1979 | 59.151 | 1978 | 57.709 | 1977 | 56.257 | 1976 | 55.221 | 1975 | 53.297 | 1974 | 52.098 | 1973 | 50.859 | 1972 | 49.571 | 1971 | 48.934 | 1970 | 47.678 | 1969 | 46.684 | 1968 | 45.525 | 1967 | 44.285 | 1966 | 43.066 | 1965 | 41.885 | 1964 | 40.679 | 1963 | 39.417 | 1962 | 38.192 | 1961 | 36.823 | 1960 | 35.45 |
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