Year | Value | 2022 | 84.729 | 2021 | 84.508 | 2020 | 84.287 | 2019 | 84.065 | 2018 | 83.844 | 2017 | 83.622 | 2016 | 83.401 | 2015 | 83.18 | 2014 | 82.96 | 2013 | 82.74 | 2012 | 82.52 | 2011 | 82.302 | 2010 | 82.084 | 2009 | 81.867 | 2008 | 81.649 | 2007 | 81.427 | 2006 | 81.204 | 2005 | 80.979 | 2004 | 80.754 | 2003 | 80.53 | 2002 | 80.304 | 2001 | 80.077 | 2000 | 79.848 | 1999 | 79.616 | 1998 | 79.383 | 1997 | 79.147 | 1996 | 78.91 | 1995 | 78.67 | 1994 | 78.429 | 1993 | 78.186 | 1992 | 77.851 | 1991 | 77.223 | 1990 | 76.583 | 1989 | 75.93 | 1988 | 75.267 | 1987 | 74.589 | 1986 | 73.9 | 1985 | 72.647 | 1984 | 71.36 | 1983 | 70.033 | 1982 | 68.673 | 1981 | 67.281 | 1980 | 65.86 | 1979 | 64.405 | 1978 | 62.925 | 1977 | 61.421 | 1976 | 59.897 | 1975 | 58.349 | 1974 | 56.704 | 1973 | 54.712 | 1972 | 52.707 | 1971 | 50.688 | 1970 | 48.669 | 1969 | 46.655 | 1968 | 44.654 | 1967 | 42.665 | 1966 | 40.702 | 1965 | 38.769 | 1964 | 36.872 | 1963 | 35.011 | 1962 | 33.518 | 1961 | 32.373 | 1960 | 31.25 |
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