Year | Value | 2022 | 68.465 | 2021 | 68.249 | 2020 | 68.046 | 2019 | 67.855 | 2018 | 67.679 | 2017 | 67.516 | 2016 | 67.366 | 2015 | 67.23 | 2014 | 67.108 | 2013 | 66.986 | 2012 | 66.864 | 2011 | 66.741 | 2010 | 66.757 | 2009 | 66.842 | 2008 | 66.848 | 2007 | 66.777 | 2006 | 66.706 | 2005 | 66.635 | 2004 | 66.646 | 2003 | 66.737 | 2002 | 66.828 | 2001 | 66.919 | 2000 | 66.986 | 1999 | 67.046 | 1998 | 67.106 | 1997 | 67.166 | 1996 | 67.225 | 1995 | 67.285 | 1994 | 67.345 | 1993 | 67.404 | 1992 | 67.464 | 1991 | 67.523 | 1990 | 67.583 | 1989 | 67.642 | 1988 | 67.28 | 1987 | 66.54 | 1986 | 65.793 | 1985 | 65.038 | 1984 | 64.277 | 1983 | 63.506 | 1982 | 62.73 | 1981 | 61.946 | 1980 | 61.158 | 1979 | 60.361 | 1978 | 59.342 | 1977 | 58.132 | 1976 | 56.915 | 1975 | 55.685 | 1974 | 54.451 | 1973 | 53.21 | 1972 | 51.968 | 1971 | 50.719 | 1970 | 49.555 | 1969 | 48.53 | 1968 | 47.507 | 1967 | 46.484 | 1966 | 45.465 | 1965 | 44.45 | 1964 | 43.441 | 1963 | 42.434 | 1962 | 41.435 | 1961 | 40.443 | 1960 | 39.46 |
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