Year | Value | 2022 | 22.599 | 2021 | 22.708 | 2020 | 22.806 | 2019 | 22.891 | 2018 | 22.963 | 2017 | 23.023 | 2016 | 23.07 | 2015 | 23.104 | 2014 | 23.139 | 2013 | 23.173 | 2012 | 23.219 | 2011 | 23.311 | 2010 | 23.403 | 2009 | 23.495 | 2008 | 23.587 | 2007 | 23.68 | 2006 | 23.773 | 2005 | 23.866 | 2004 | 23.959 | 2003 | 24.053 | 2002 | 24.215 | 2001 | 24.445 | 2000 | 24.677 | 1999 | 24.911 | 1998 | 25.145 | 1997 | 25.382 | 1996 | 25.574 | 1995 | 25.723 | 1994 | 25.873 | 1993 | 26.023 | 1992 | 26.173 | 1991 | 26.324 | 1990 | 26.636 | 1989 | 27.112 | 1988 | 27.592 | 1987 | 28.079 | 1986 | 28.57 | 1985 | 29.067 | 1984 | 29.567 | 1983 | 30.075 | 1982 | 30.586 | 1981 | 31.147 | 1980 | 31.894 | 1979 | 32.654 | 1978 | 33.421 | 1977 | 34.198 | 1976 | 34.982 | 1975 | 35.776 | 1974 | 36.577 | 1973 | 37.386 | 1972 | 38.2 | 1971 | 39.024 | 1970 | 39.734 | 1969 | 39.919 | 1968 | 40.105 | 1967 | 40.291 | 1966 | 40.477 | 1965 | 40.663 | 1964 | 40.85 | 1963 | 41.037 | 1962 | 41.224 | 1961 | 41.412 | 1960 | 41.599 |
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