Year | Value | 2021 | 75.743 | 2020 | 75.725 | 2019 | 75.7 | 2018 | 75.632 | 2017 | 75.624 | 2016 | 75.514 | 2015 | 75.515 | 2014 | 75.859 | 2013 | 75.294 | 2012 | 74.634 | 2011 | 74.058 | 2010 | 73.535 | 2009 | 72.996 | 2008 | 72.252 | 2007 | 72.236 | 2006 | 72.455 | 2005 | 72.71 | 2004 | 72.92 | 2003 | 73.098 | 2002 | 63.765 | 2001 | 63.756 | 2000 | 63.813 | 1999 | 63.9 | 1998 | 64.112 | 1997 | 64.241 | 1996 | 64.247 | 1995 | 64.24 | 1994 | 74.901 | 1993 | 76.301 | 1992 | 74.639 | 1991 | 74.016 | 1990 | 73.824 | 1989 | 73.53 | 1988 | 73.188 | 1987 | 72.725 | 1986 | 72.347 | 1985 | 71.774 | 1984 | 71.2 | 1983 | 70.609 | 1982 | 70.012 | 1981 | 69.426 | 1980 | 68.844 | 1979 | 68.267 | 1978 | 67.687 | 1977 | 67.063 | 1976 | 66.501 | 1975 | 65.892 | 1974 | 65.27 | 1973 | 64.638 | 1972 | 63.994 | 1971 | 63.294 | 1970 | 62.654 | 1969 | 61.935 | 1968 | 61.171 | 1967 | 60.377 | 1966 | 59.507 | 1965 | 58.706 | 1964 | 58.021 | 1963 | 57.354 | 1962 | 56.775 | 1961 | 56.193 | 1960 | 55.669 |
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