Year | Value | 2021 | 66.056 | 2020 | 66.334 | 2019 | 70.931 | 2018 | 70.829 | 2017 | 71.044 | 2016 | 71.398 | 2015 | 71.723 | 2014 | 71.859 | 2013 | 71.814 | 2012 | 71.651 | 2011 | 71.451 | 2010 | 71.295 | 2009 | 71.273 | 2008 | 71.376 | 2007 | 71.54 | 2006 | 71.697 | 2005 | 71.782 | 2004 | 71.781 | 2003 | 71.653 | 2002 | 71.422 | 2001 | 71.098 | 2000 | 70.692 | 1999 | 70.227 | 1998 | 69.717 | 1997 | 69.194 | 1996 | 68.674 | 1995 | 68.201 | 1994 | 67.781 | 1993 | 67.43 | 1992 | 67.112 | 1991 | 66.826 | 1990 | 66.533 | 1989 | 66.221 | 1988 | 65.877 | 1987 | 65.485 | 1986 | 65.026 | 1985 | 64.495 | 1984 | 63.874 | 1983 | 63.177 | 1982 | 62.454 | 1981 | 61.767 | 1980 | 61.166 | 1979 | 60.716 | 1978 | 60.425 | 1977 | 60.245 | 1976 | 60.117 | 1975 | 59.991 | 1974 | 59.816 | 1973 | 59.571 | 1972 | 59.272 | 1971 | 58.934 | 1970 | 58.575 | 1969 | 58.22 | 1968 | 57.864 | 1967 | 57.492 | 1966 | 57.077 | 1965 | 56.609 | 1964 | 56.067 | 1963 | 55.438 | 1962 | 54.732 | 1961 | 53.978 | 1960 | 53.186 |
|