Year | Value | 2021 | 70.348 | 2020 | 70.199 | 2019 | 70.382 | 2018 | 70.173 | 2017 | 69.988 | 2016 | 69.801 | 2015 | 69.583 | 2014 | 69.234 | 2013 | 69.188 | 2012 | 69.084 | 2011 | 68.908 | 2010 | 68.732 | 2009 | 68.466 | 2008 | 68.404 | 2007 | 67.986 | 2006 | 68.09 | 2005 | 67.936 | 2004 | 67.801 | 2003 | 67.644 | 2002 | 67.515 | 2001 | 67.364 | 2000 | 67.225 | 1999 | 67.069 | 1998 | 66.92 | 1997 | 66.742 | 1996 | 66.59 | 1995 | 66.381 | 1994 | 66.188 | 1993 | 65.958 | 1992 | 65.767 | 1991 | 65.579 | 1990 | 65.392 | 1989 | 65.186 | 1988 | 64.973 | 1987 | 64.764 | 1986 | 63.76 | 1985 | 64.29 | 1984 | 63.998 | 1983 | 63.762 | 1982 | 63.509 | 1981 | 63.161 | 1980 | 62.8 | 1979 | 62.388 | 1978 | 61.911 | 1977 | 60.864 | 1976 | 60.749 | 1975 | 58.078 | 1974 | 59.356 | 1973 | 58.594 | 1972 | 57.797 | 1971 | 56.978 | 1970 | 56.072 | 1969 | 55.163 | 1968 | 54.239 | 1967 | 53.208 | 1966 | 52.461 | 1965 | 51.659 | 1964 | 50.859 | 1963 | 50.049 | 1962 | 49.254 | 1961 | 48.434 | 1960 | 47.741 |
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