Year | Value | 2021 | 71.893 | 2020 | 71.757 | 2019 | 72.245 | 2018 | 72.028 | 2017 | 71.783 | 2016 | 71.502 | 2015 | 71.166 | 2014 | 70.788 | 2013 | 70.371 | 2012 | 69.933 | 2011 | 69.601 | 2010 | 69.244 | 2009 | 68.846 | 2008 | 68.413 | 2007 | 67.942 | 2006 | 67.454 | 2005 | 67.077 | 2004 | 66.659 | 2003 | 66.31 | 2002 | 65.932 | 2001 | 65.542 | 2000 | 65.135 | 1999 | 64.777 | 1998 | 64.441 | 1997 | 64.079 | 1996 | 63.692 | 1995 | 63.181 | 1994 | 62.799 | 1993 | 62.341 | 1992 | 61.918 | 1991 | 61.459 | 1990 | 60.962 | 1989 | 60.417 | 1988 | 59.858 | 1987 | 59.289 | 1986 | 58.641 | 1985 | 57.919 | 1984 | 57.173 | 1983 | 56.443 | 1982 | 55.646 | 1981 | 54.832 | 1980 | 54.068 | 1979 | 53.288 | 1978 | 52.483 | 1977 | 51.729 | 1976 | 50.973 | 1975 | 50.266 | 1974 | 49.68 | 1973 | 49.169 | 1972 | 48.7 | 1971 | 48.197 | 1970 | 47.791 | 1969 | 47.308 | 1968 | 46.79 | 1967 | 46.223 | 1966 | 45.615 | 1965 | 45.032 | 1964 | 44.467 | 1963 | 43.903 | 1962 | 43.397 | 1961 | 42.892 | 1960 | 41.264 |
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