Year | Value | 2021 | 72.128 | 2020 | 72.987 | 2019 | 73.894 | 2018 | 73.677 | 2017 | 73.46 | 2016 | 73.222 | 2015 | 73.03 | 2014 | 72.796 | 2013 | 72.565 | 2012 | 72.399 | 2011 | 72.26 | 2010 | 72.117 | 2009 | 71.972 | 2008 | 71.818 | 2007 | 71.654 | 2006 | 71.48 | 2005 | 71.264 | 2004 | 71.117 | 2003 | 70.928 | 2002 | 70.724 | 2001 | 70.528 | 2000 | 70.313 | 1999 | 70.109 | 1998 | 69.919 | 1997 | 69.766 | 1996 | 69.613 | 1995 | 69.446 | 1994 | 69.274 | 1993 | 69.098 | 1992 | 68.899 | 1991 | 68.679 | 1990 | 68.46 | 1989 | 68.19 | 1988 | 67.902 | 1987 | 67.579 | 1986 | 67.291 | 1985 | 67.004 | 1984 | 66.699 | 1983 | 66.358 | 1982 | 66.002 | 1981 | 65.601 | 1980 | 65.169 | 1979 | 64.775 | 1978 | 64.404 | 1977 | 63.993 | 1976 | 63.549 | 1975 | 63.065 | 1974 | 62.543 | 1973 | 62.072 | 1972 | 61.556 | 1971 | 60.831 | 1970 | 58.731 | 1969 | 59.743 | 1968 | 59.119 | 1967 | 58.41 | 1966 | 57.253 | 1965 | 56.845 | 1964 | 56.027 | 1963 | 55.044 | 1962 | 54.215 | 1961 | 53.268 | 1960 | 52.264 |
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