Year | Value | 2021 | 70.141 | 2020 | 69.965 | 2019 | 69.813 | 2018 | 69.602 | 2017 | 69.371 | 2016 | 69.141 | 2015 | 68.875 | 2014 | 68.567 | 2013 | 68.233 | 2012 | 67.836 | 2011 | 67.407 | 2010 | 67.027 | 2009 | 66.495 | 2008 | 66.073 | 2007 | 65.515 | 2006 | 64.915 | 2005 | 64.427 | 2004 | 63.898 | 2003 | 63.335 | 2002 | 62.727 | 2001 | 62.134 | 2000 | 60.712 | 1999 | 60.94 | 1998 | 60.263 | 1997 | 59.598 | 1996 | 58.986 | 1995 | 58.306 | 1994 | 57.464 | 1993 | 56.947 | 1992 | 56.268 | 1991 | 55.504 | 1990 | 54.848 | 1989 | 54.174 | 1988 | 53.462 | 1987 | 52.712 | 1986 | 51.923 | 1985 | 51.147 | 1984 | 50.441 | 1983 | 49.656 | 1982 | 48.86 | 1981 | 48.048 | 1980 | 47.239 | 1979 | 46.455 | 1978 | 45.679 | 1977 | 44.863 | 1976 | 44.062 | 1975 | 43.211 | 1974 | 42.381 | 1973 | 41.564 | 1972 | 40.718 | 1971 | 39.831 | 1970 | 39.023 | 1969 | 38.187 | 1968 | 37.32 | 1967 | 36.656 | 1966 | 35.99 | 1965 | 35.334 | 1964 | 34.714 | 1963 | 34.134 | 1962 | 33.583 | 1961 | 33.063 | 1960 | 32.575 |
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