Year | Value | 2022 | 71.657 | 2021 | 71.346 | 2020 | 71.039 | 2019 | 70.736 | 2018 | 70.438 | 2017 | 70.144 | 2016 | 69.855 | 2015 | 69.565 | 2014 | 69.272 | 2013 | 68.979 | 2012 | 68.684 | 2011 | 68.444 | 2010 | 68.327 | 2009 | 68.209 | 2008 | 68.092 | 2007 | 67.974 | 2006 | 67.856 | 2005 | 67.738 | 2004 | 67.62 | 2003 | 67.501 | 2002 | 67.382 | 2001 | 67.282 | 2000 | 67.222 | 1999 | 67.162 | 1998 | 67.102 | 1997 | 67.042 | 1996 | 66.982 | 1995 | 66.922 | 1994 | 66.862 | 1993 | 66.802 | 1992 | 66.742 | 1991 | 66.706 | 1990 | 66.726 | 1989 | 66.746 | 1988 | 66.766 | 1987 | 66.786 | 1986 | 66.806 | 1985 | 66.826 | 1984 | 66.846 | 1983 | 66.866 | 1982 | 66.886 | 1981 | 66.837 | 1980 | 66.64 | 1979 | 66.442 | 1978 | 66.243 | 1977 | 66.044 | 1976 | 65.844 | 1975 | 65.643 | 1974 | 65.442 | 1973 | 65.241 | 1972 | 65.039 | 1971 | 64.75 | 1970 | 64.272 | 1969 | 63.792 | 1968 | 63.309 | 1967 | 62.822 | 1966 | 62.334 | 1965 | 61.843 | 1964 | 61.35 | 1963 | 60.853 | 1962 | 60.355 | 1961 | 59.856 | 1960 | 59.361 |
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