Year | Value | 2021 | 76.399 | 2020 | 76.393 | 2019 | 76.008 | 2018 | 75.748 | 2017 | 75.403 | 2016 | 75.331 | 2015 | 74.927 | 2014 | 74.651 | 2013 | 74.239 | 2012 | 73.906 | 2011 | 73.38 | 2010 | 73.215 | 2009 | 69.187 | 2008 | 71.729 | 2007 | 72.049 | 2006 | 71.969 | 2005 | 72.118 | 2004 | 67.091 | 2003 | 71.373 | 2002 | 71.117 | 2001 | 70.787 | 2000 | 70.355 | 1999 | 72.618 | 1998 | 72.081 | 1997 | 72.136 | 1996 | 72.261 | 1995 | 72.26 | 1994 | 72.882 | 1993 | 73.052 | 1992 | 72.53 | 1991 | 71.751 | 1990 | 71.927 | 1989 | 69.761 | 1988 | 71.549 | 1987 | 71.457 | 1986 | 71.421 | 1985 | 70.969 | 1984 | 70.649 | 1983 | 70.068 | 1982 | 69.674 | 1981 | 69.212 | 1980 | 68.661 | 1979 | 68.13 | 1978 | 67.566 | 1977 | 66.551 | 1976 | 66.513 | 1975 | 66.237 | 1974 | 65.999 | 1973 | 65.939 | 1972 | 65.828 | 1971 | 65.922 | 1970 | 65.267 | 1969 | 63.993 | 1968 | 63.777 | 1967 | 63.51 | 1966 | 63.055 | 1965 | 62.637 | 1964 | 62.174 | 1963 | 61.976 | 1962 | 61.733 | 1961 | 61.328 | 1960 | 60.699 |
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