Year | Value | 2021 | 21.836 | 2020 | 22.056 | 2019 | 22.323 | 2018 | 22.634 | 2017 | 22.986 | 2016 | 23.355 | 2015 | 23.74 | 2014 | 24.14 | 2013 | 24.541 | 2012 | 24.934 | 2011 | 25.338 | 2010 | 25.749 | 2009 | 26.132 | 2008 | 26.546 | 2007 | 26.988 | 2006 | 27.423 | 2005 | 27.424 | 2004 | 27.754 | 2003 | 28.18 | 2002 | 28.572 | 2001 | 29.052 | 2000 | 29.717 | 1999 | 30.39 | 1998 | 30.703 | 1997 | 31.126 | 1996 | 31.875 | 1995 | 32.406 | 1994 | 33.084 | 1993 | 33.91 | 1992 | 34.645 | 1991 | 35.263 | 1990 | 35.84 | 1989 | 36.278 | 1988 | 36.715 | 1987 | 37.109 | 1986 | 37.347 | 1985 | 37.638 | 1984 | 37.915 | 1983 | 38.27 | 1982 | 38.693 | 1981 | 39.136 | 1980 | 39.524 | 1979 | 39.899 | 1978 | 40.266 | 1977 | 40.58 | 1976 | 40.829 | 1975 | 41.014 | 1974 | 41.374 | 1973 | 41.627 | 1972 | 41.86 | 1971 | 42.187 | 1970 | 42.377 | 1969 | 42.647 | 1968 | 42.883 | 1967 | 43.054 | 1966 | 43.228 | 1965 | 43.469 | 1964 | 43.699 | 1963 | 43.914 | 1962 | 44.11 | 1961 | 44.259 | 1960 | 44.359 |
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