Year | Value | 2021 | 67.114 | 2020 | 67.924 | 2019 | 67.893 | 2018 | 67.81 | 2017 | 67.79 | 2016 | 67.24 | 2015 | 66.844 | 2014 | 67.376 | 2013 | 67.428 | 2012 | 67.552 | 2011 | 67.523 | 2010 | 67.328 | 2009 | 67.089 | 2008 | 66.935 | 2007 | 66.826 | 2006 | 66.855 | 2005 | 66.632 | 2004 | 66.424 | 2003 | 66.177 | 2002 | 65.748 | 2001 | 66.34 | 2000 | 66.31 | 1999 | 66.763 | 1998 | 66.68 | 1997 | 66.448 | 1996 | 66.408 | 1995 | 66.286 | 1994 | 66.125 | 1993 | 65.928 | 1992 | 65.827 | 1991 | 65.643 | 1990 | 65.508 | 1989 | 65.277 | 1988 | 65.149 | 1987 | 64.936 | 1986 | 64.715 | 1985 | 64.526 | 1984 | 63.892 | 1983 | 63.29 | 1982 | 62.793 | 1981 | 62.729 | 1980 | 62.734 | 1979 | 62.941 | 1978 | 62.527 | 1977 | 62.273 | 1976 | 61.975 | 1975 | 61.852 | 1974 | 61.686 | 1973 | 61.022 | 1972 | 61.784 | 1971 | 61.796 | 1970 | 61.713 | 1969 | 61.538 | 1968 | 61.772 | 1967 | 61.576 | 1966 | 61.154 | 1965 | 60.805 | 1964 | 60.219 | 1963 | 59.552 | 1962 | 58.934 | 1961 | 58.199 | 1960 | 57.588 |
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