Year | Value | 2022 | 77.401 | 2021 | 77.292 | 2020 | 77.194 | 2019 | 77.109 | 2018 | 77.037 | 2017 | 76.977 | 2016 | 76.93 | 2015 | 76.896 | 2014 | 76.861 | 2013 | 76.827 | 2012 | 76.781 | 2011 | 76.689 | 2010 | 76.597 | 2009 | 76.505 | 2008 | 76.413 | 2007 | 76.32 | 2006 | 76.227 | 2005 | 76.134 | 2004 | 76.041 | 2003 | 75.947 | 2002 | 75.785 | 2001 | 75.555 | 2000 | 75.323 | 1999 | 75.089 | 1998 | 74.855 | 1997 | 74.618 | 1996 | 74.426 | 1995 | 74.277 | 1994 | 74.127 | 1993 | 73.977 | 1992 | 73.827 | 1991 | 73.676 | 1990 | 73.364 | 1989 | 72.888 | 1988 | 72.408 | 1987 | 71.921 | 1986 | 71.43 | 1985 | 70.933 | 1984 | 70.433 | 1983 | 69.925 | 1982 | 69.414 | 1981 | 68.853 | 1980 | 68.106 | 1979 | 67.346 | 1978 | 66.579 | 1977 | 65.802 | 1976 | 65.018 | 1975 | 64.224 | 1974 | 63.423 | 1973 | 62.614 | 1972 | 61.8 | 1971 | 60.976 | 1970 | 60.266 | 1969 | 60.081 | 1968 | 59.895 | 1967 | 59.709 | 1966 | 59.523 | 1965 | 59.337 | 1964 | 59.15 | 1963 | 58.963 | 1962 | 58.776 | 1961 | 58.588 | 1960 | 58.401 |
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