Year | Value | 2021 | 70.362 | 2020 | 71.173 | 2019 | 71.351 | 2018 | 70.719 | 2017 | 70.638 | 2016 | 70.515 | 2015 | 69.079 | 2014 | 69.818 | 2013 | 69.752 | 2012 | 69.223 | 2011 | 69.094 | 2010 | 68.566 | 2009 | 68.576 | 2008 | 68.222 | 2007 | 68.21 | 2006 | 67.787 | 2005 | 67.465 | 2004 | 66.834 | 2003 | 66.095 | 2002 | 65.261 | 2001 | 64.952 | 2000 | 64.078 | 1999 | 63.506 | 1998 | 62.963 | 1997 | 61.855 | 1996 | 60.907 | 1995 | 60.065 | 1994 | 59.221 | 1993 | 58.163 | 1992 | 56.956 | 1991 | 55.967 | 1990 | 54.859 | 1989 | 54.119 | 1988 | 52.979 | 1987 | 52.354 | 1986 | 51.325 | 1985 | 50.667 | 1984 | 50.012 | 1983 | 49.24 | 1982 | 48.85 | 1981 | 48.407 | 1980 | 47.878 | 1979 | 47.372 | 1978 | 46.838 | 1977 | 46.048 | 1976 | 45.68 | 1975 | 45.116 | 1974 | 44.582 | 1973 | 44.186 | 1972 | 43.867 | 1971 | 43.531 | 1970 | 43.062 | 1969 | 42.398 | 1968 | 41.928 | 1967 | 41.502 | 1966 | 40.889 | 1965 | 40.519 | 1964 | 40.078 | 1963 | 39.534 | 1962 | 39.233 | 1961 | 39.03 | 1960 | 38.71 |
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