Year | Value | 2021 | 63.63 | 2020 | 64.467 | 2019 | 67.841 | 2018 | 67.748 | 2017 | 67.701 | 2016 | 67.628 | 2015 | 67.318 | 2014 | 67.163 | 2013 | 67.021 | 2012 | 66.705 | 2011 | 66.534 | 2010 | 66.162 | 2009 | 65.88 | 2008 | 65.446 | 2007 | 65.027 | 2006 | 64.779 | 2005 | 64.386 | 2004 | 64.004 | 2003 | 63.635 | 2002 | 63.306 | 2001 | 62.843 | 2000 | 62.346 | 1999 | 61.871 | 1998 | 61.332 | 1997 | 60.752 | 1996 | 60.084 | 1995 | 59.534 | 1994 | 58.989 | 1993 | 58.418 | 1992 | 57.629 | 1991 | 57.097 | 1990 | 56.422 | 1989 | 55.772 | 1988 | 55.156 | 1987 | 54.492 | 1986 | 53.929 | 1985 | 53.446 | 1984 | 52.971 | 1983 | 52.405 | 1982 | 52.053 | 1981 | 51.619 | 1980 | 51.181 | 1979 | 50.665 | 1978 | 50.181 | 1977 | 49.734 | 1976 | 49.264 | 1975 | 48.826 | 1974 | 48.446 | 1973 | 47.975 | 1972 | 47.497 | 1971 | 47.061 | 1970 | 46.597 | 1969 | 46.215 | 1968 | 45.796 | 1967 | 45.419 | 1966 | 45.118 | 1965 | 44.712 | 1964 | 44.366 | 1963 | 44.077 | 1962 | 43.791 | 1961 | 43.4 | 1960 | 43.1 |
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