Year | Value | 2022 | 68.676 | 2021 | 68.754 | 2020 | 68.809 | 2019 | 68.842 | 2018 | 68.853 | 2017 | 68.841 | 2016 | 68.807 | 2015 | 68.751 | 2014 | 68.672 | 2013 | 68.571 | 2012 | 68.447 | 2011 | 68.3 | 2010 | 68.13 | 2009 | 67.937 | 2008 | 67.744 | 2007 | 67.549 | 2006 | 67.354 | 2005 | 67.159 | 2004 | 66.963 | 2003 | 66.766 | 2002 | 66.569 | 2001 | 66.371 | 2000 | 66.173 | 1999 | 65.848 | 1998 | 65.497 | 1997 | 65.144 | 1996 | 64.79 | 1995 | 64.434 | 1994 | 64.076 | 1993 | 63.717 | 1992 | 63.357 | 1991 | 62.994 | 1990 | 62.63 | 1989 | 62.346 | 1988 | 62.077 | 1987 | 61.806 | 1986 | 61.536 | 1985 | 61.264 | 1984 | 60.993 | 1983 | 60.72 | 1982 | 60.446 | 1981 | 60.172 | 1980 | 59.898 | 1979 | 60.09 | 1978 | 60.354 | 1977 | 60.619 | 1976 | 60.882 | 1975 | 61.145 | 1974 | 61.408 | 1973 | 61.669 | 1972 | 61.93 | 1971 | 62.191 | 1970 | 62.45 | 1969 | 62.567 | 1968 | 62.64 | 1967 | 62.713 | 1966 | 62.786 | 1965 | 62.859 | 1964 | 62.932 | 1963 | 63.005 | 1962 | 63.078 | 1961 | 63.151 | 1960 | 63.223 |
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