Year | Value | 2021 | 67.354 | 2020 | 69.812 | 2019 | 70.533 | 2018 | 71.816 | 2017 | 71.98 | 2016 | 71.894 | 2015 | 71.99 | 2014 | 71.974 | 2013 | 71.443 | 2012 | 71.665 | 2011 | 72.221 | 2010 | 72.24 | 2009 | 72.571 | 2008 | 72.35 | 2007 | 72.245 | 2006 | 71.489 | 2005 | 71.071 | 2004 | 70.711 | 2003 | 69.821 | 2002 | 69.327 | 2001 | 69.264 | 2000 | 68.808 | 1999 | 68.76 | 1998 | 68.963 | 1997 | 69.015 | 1996 | 69.195 | 1995 | 70.087 | 1994 | 69.863 | 1993 | 70.357 | 1992 | 70.216 | 1991 | 70.233 | 1990 | 69.829 | 1989 | 70.392 | 1988 | 70.247 | 1987 | 70.681 | 1986 | 70.298 | 1985 | 70.353 | 1984 | 69.954 | 1983 | 69.683 | 1982 | 68.927 | 1981 | 68.801 | 1980 | 68.472 | 1979 | 67.79 | 1978 | 67.203 | 1977 | 67.023 | 1976 | 66.673 | 1975 | 66.465 | 1974 | 66.142 | 1973 | 65.683 | 1972 | 65.764 | 1971 | 65.898 | 1970 | 65.752 | 1969 | 65.416 | 1968 | 64.836 | 1967 | 64.053 | 1966 | 63.009 | 1965 | 61.705 | 1964 | 60.105 | 1963 | 58.492 | 1962 | 57.034 | 1961 | 55.414 | 1960 | 54.099 |
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