Year | Value | 2021 | 70.121 | 2020 | 70.808 | 2019 | 73.904 | 2018 | 73.8 | 2017 | 73.729 | 2016 | 73.697 | 2015 | 73.577 | 2014 | 73.321 | 2013 | 72.948 | 2012 | 72.513 | 2011 | 72.086 | 2010 | 71.623 | 2009 | 71.398 | 2008 | 71.383 | 2007 | 71.272 | 2006 | 71.243 | 2005 | 71.053 | 2004 | 70.689 | 2003 | 70.16 | 2002 | 69.496 | 2001 | 68.758 | 2000 | 68.03 | 1999 | 67.298 | 1998 | 66.623 | 1997 | 66.138 | 1996 | 65.684 | 1995 | 65.176 | 1994 | 64.775 | 1993 | 64.151 | 1992 | 63.539 | 1991 | 62.843 | 1990 | 62.428 | 1989 | 61.577 | 1988 | 60.863 | 1987 | 60.069 | 1986 | 59.303 | 1985 | 58.578 | 1984 | 57.608 | 1983 | 57.553 | 1982 | 57.658 | 1981 | 57.661 | 1980 | 57.521 | 1979 | 57.336 | 1978 | 57.088 | 1977 | 56.802 | 1976 | 56.512 | 1975 | 56.209 | 1974 | 55.858 | 1973 | 55.531 | 1972 | 55.25 | 1971 | 54.762 | 1970 | 46.816 | 1969 | 53.987 | 1968 | 53.536 | 1967 | 53.062 | 1966 | 52.577 | 1965 | 52.06 | 1964 | 51.625 | 1963 | 51.103 | 1962 | 50.244 | 1961 | 49.97 | 1960 | 49.371 |
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