Year | Value | 2021 | 63.753 | 2020 | 64.65 | 2019 | 65.092 | 2018 | 64.575 | 2017 | 65.957 | 2016 | 66.064 | 2015 | 65.873 | 2014 | 67.384 | 2013 | 67.545 | 2012 | 67.343 | 2011 | 67.419 | 2010 | 67.28 | 2009 | 67.196 | 2008 | 66.963 | 2007 | 66.565 | 2006 | 65.988 | 2005 | 65.543 | 2004 | 65.006 | 2003 | 64.541 | 2002 | 63.906 | 2001 | 63.222 | 2000 | 62.588 | 1999 | 61.975 | 1998 | 61.375 | 1997 | 61.119 | 1996 | 60.568 | 1995 | 60.453 | 1994 | 59.714 | 1993 | 59.859 | 1992 | 59.428 | 1991 | 59.049 | 1990 | 58.699 | 1989 | 58.218 | 1988 | 57.759 | 1987 | 57.096 | 1986 | 53.819 | 1985 | 55.693 | 1984 | 54.934 | 1983 | 53.923 | 1982 | 52.405 | 1981 | 51.709 | 1980 | 50.654 | 1979 | 49.394 | 1978 | 48.392 | 1977 | 47.286 | 1976 | 46.238 | 1975 | 45.245 | 1974 | 44.325 | 1973 | 43.348 | 1972 | 42.46 | 1971 | 41.542 | 1970 | 40.501 | 1969 | 39.474 | 1968 | 37.796 | 1967 | 36.866 | 1966 | 36.097 | 1965 | 35.373 | 1964 | 34.738 | 1963 | 33.247 | 1962 | 33.615 | 1961 | 34.098 | 1960 | 33.678 |
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