Year | Value | 2022 | 67.381 | 2021 | 66.849 | 2020 | 66.31 | 2019 | 65.764 | 2018 | 65.211 | 2017 | 64.652 | 2016 | 64.086 | 2015 | 63.514 | 2014 | 62.936 | 2013 | 62.352 | 2012 | 61.763 | 2011 | 61.167 | 2010 | 60.567 | 2009 | 59.964 | 2008 | 59.359 | 2007 | 58.749 | 2006 | 58.137 | 2005 | 57.522 | 2004 | 56.907 | 2003 | 56.287 | 2002 | 55.666 | 2001 | 55.044 | 2000 | 54.399 | 1999 | 53.743 | 1998 | 53.086 | 1997 | 52.428 | 1996 | 51.77 | 1995 | 51.109 | 1994 | 50.449 | 1993 | 49.789 | 1992 | 49.13 | 1991 | 48.469 | 1990 | 47.915 | 1989 | 47.391 | 1988 | 46.867 | 1987 | 46.342 | 1986 | 45.82 | 1985 | 45.298 | 1984 | 44.777 | 1983 | 44.257 | 1982 | 43.738 | 1981 | 43.221 | 1980 | 42.785 | 1979 | 42.381 | 1978 | 41.979 | 1977 | 41.578 | 1976 | 41.179 | 1975 | 40.779 | 1974 | 40.382 | 1973 | 39.985 | 1972 | 39.591 | 1971 | 39.197 | 1970 | 38.804 | 1969 | 38.414 | 1968 | 38.025 | 1967 | 37.636 | 1966 | 37.25 | 1965 | 36.866 | 1964 | 36.483 | 1963 | 36.101 | 1962 | 35.722 | 1961 | 35.344 | 1960 | 34.955 |
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