Year | Value | 2021 | 72.602 | 2020 | 72.749 | 2019 | 72.706 | 2018 | 72.668 | 2017 | 72.685 | 2016 | 72.697 | 2015 | 72.714 | 2014 | 72.741 | 2013 | 72.774 | 2012 | 72.803 | 2011 | 72.845 | 2010 | 72.843 | 2009 | 72.851 | 2008 | 72.862 | 2007 | 72.844 | 2006 | 72.81 | 2005 | 72.756 | 2004 | 72.663 | 2003 | 72.578 | 2002 | 72.43 | 2001 | 72.289 | 2000 | 72.086 | 1999 | 71.875 | 1998 | 71.641 | 1997 | 71.397 | 1996 | 71.15 | 1995 | 70.886 | 1994 | 70.658 | 1993 | 70.452 | 1992 | 70.269 | 1991 | 70.136 | 1990 | 69.975 | 1989 | 69.841 | 1988 | 69.705 | 1987 | 69.562 | 1986 | 69.409 | 1985 | 69.218 | 1984 | 69.081 | 1983 | 68.885 | 1982 | 68.701 | 1981 | 68.503 | 1980 | 68.28 | 1979 | 68.024 | 1978 | 67.738 | 1977 | 67.401 | 1976 | 67.023 | 1975 | 66.595 | 1974 | 66.064 | 1973 | 65.585 | 1972 | 65.033 | 1971 | 64.433 | 1970 | 63.891 | 1969 | 63.365 | 1968 | 62.858 | 1967 | 62.39 | 1966 | 61.798 | 1965 | 60.977 | 1964 | 60.35 | 1963 | 59.488 | 1962 | 56.482 | 1961 | 57.462 | 1960 | 56.391 |
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