Year | Value | 2022 | 31.836 | 2021 | 32.174 | 2020 | 32.512 | 2019 | 32.85 | 2018 | 33.187 | 2017 | 33.523 | 2016 | 33.859 | 2015 | 34.194 | 2014 | 34.529 | 2013 | 34.863 | 2012 | 35.196 | 2011 | 35.528 | 2010 | 35.86 | 2009 | 36.192 | 2008 | 36.525 | 2007 | 36.861 | 2006 | 37.197 | 2005 | 37.535 | 2004 | 37.873 | 2003 | 38.432 | 2002 | 39.432 | 2001 | 40.441 | 2000 | 41.456 | 1999 | 42.482 | 1998 | 43.512 | 1997 | 44.549 | 1996 | 45.588 | 1995 | 46.635 | 1994 | 47.683 | 1993 | 48.733 | 1992 | 49.782 | 1991 | 50.835 | 1990 | 51.963 | 1989 | 53.114 | 1988 | 54.261 | 1987 | 55.406 | 1986 | 56.544 | 1985 | 57.675 | 1984 | 58.796 | 1983 | 59.912 | 1982 | 61.016 | 1981 | 62.108 | 1980 | 63.187 | 1979 | 64.256 | 1978 | 65.31 | 1977 | 66.348 | 1976 | 67.37 | 1975 | 68.378 | 1974 | 69.368 | 1973 | 70.341 | 1972 | 71.294 | 1971 | 72.231 | 1970 | 73.147 | 1969 | 74.045 | 1968 | 74.921 | 1967 | 75.78 | 1966 | 76.617 | 1965 | 77.434 | 1964 | 78.23 | 1963 | 79.007 | 1962 | 79.763 | 1961 | 80.498 | 1960 | 81.212 |
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