Year | Value | 2021 | 70.743 | 2020 | 71.837 | 2019 | 72.895 | 2018 | 72.864 | 2017 | 72.825 | 2016 | 72.76 | 2015 | 72.77 | 2014 | 72.757 | 2013 | 72.733 | 2012 | 72.669 | 2011 | 72.536 | 2010 | 72.552 | 2009 | 72.456 | 2008 | 72.451 | 2007 | 72.311 | 2006 | 72.189 | 2005 | 72.038 | 2004 | 71.859 | 2003 | 71.745 | 2002 | 71.525 | 2001 | 71.311 | 2000 | 71.115 | 1999 | 70.863 | 1998 | 70.535 | 1997 | 70.357 | 1996 | 69.967 | 1995 | 69.596 | 1994 | 69.312 | 1993 | 68.913 | 1992 | 68.461 | 1991 | 68.221 | 1990 | 67.924 | 1989 | 67.617 | 1988 | 67.608 | 1987 | 66.869 | 1986 | 66.205 | 1985 | 65.523 | 1984 | 64.817 | 1983 | 64.085 | 1982 | 63.441 | 1981 | 62.799 | 1980 | 62.055 | 1979 | 61.333 | 1978 | 60.611 | 1977 | 60.119 | 1976 | 59.007 | 1975 | 58.127 | 1974 | 56.927 | 1973 | 55.947 | 1972 | 54.86 | 1971 | 53.69 | 1970 | 52.89 | 1969 | 51.468 | 1968 | 50.468 | 1967 | 49.41 | 1966 | 48.305 | 1965 | 47.285 | 1964 | 46.28 | 1963 | 45.391 | 1962 | 44.46 | 1961 | 42.698 | 1960 | 42.903 |
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