Year | Value | 2021 | 64.999 | 2020 | 67.964 | 2019 | 69.107 | 2018 | 68.74 | 2017 | 68.43 | 2016 | 67.794 | 2015 | 66.781 | 2014 | 66.259 | 2013 | 65.267 | 2012 | 64.449 | 2011 | 63.111 | 2010 | 61.266 | 2009 | 59.722 | 2008 | 58.111 | 2007 | 56.852 | 2006 | 55.892 | 2005 | 55.431 | 2004 | 55.721 | 2003 | 56.232 | 2002 | 57.668 | 2001 | 59.47 | 2000 | 61.049 | 1999 | 62.008 | 1998 | 62.883 | 1997 | 63.828 | 1996 | 64.721 | 1995 | 65.749 | 1994 | 66.189 | 1993 | 66.832 | 1992 | 67.067 | 1991 | 66.945 | 1990 | 66.712 | 1989 | 66.356 | 1988 | 66.475 | 1987 | 65.968 | 1986 | 65.942 | 1985 | 65.405 | 1984 | 65.014 | 1983 | 64.773 | 1982 | 64.296 | 1981 | 63.832 | 1980 | 63.224 | 1979 | 62.814 | 1978 | 62.366 | 1977 | 61.794 | 1976 | 61.21 | 1975 | 60.652 | 1974 | 60.163 | 1973 | 59.669 | 1972 | 59.175 | 1971 | 58.767 | 1970 | 58.317 | 1969 | 57.888 | 1968 | 57.506 | 1967 | 57.22 | 1966 | 56.864 | 1965 | 56.555 | 1964 | 56.217 | 1963 | 55.905 | 1962 | 55.595 | 1961 | 55.254 | 1960 | 54.751 |
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