Year | Value | 2022 | 42.967 | 2021 | 42.862 | 2020 | 42.783 | 2019 | 42.73 | 2018 | 42.704 | 2017 | 42.705 | 2016 | 42.732 | 2015 | 42.785 | 2014 | 42.839 | 2013 | 42.893 | 2012 | 42.946 | 2011 | 43 | 2010 | 43.019 | 2009 | 43.039 | 2008 | 43.058 | 2007 | 43.078 | 2006 | 43.073 | 2005 | 43.027 | 2004 | 42.981 | 2003 | 42.935 | 2002 | 42.889 | 2001 | 42.843 | 2000 | 42.797 | 1999 | 42.75 | 1998 | 42.704 | 1997 | 42.658 | 1996 | 42.681 | 1995 | 42.814 | 1994 | 42.946 | 1993 | 43.079 | 1992 | 43.212 | 1991 | 43.345 | 1990 | 43.478 | 1989 | 43.611 | 1988 | 43.744 | 1987 | 43.877 | 1986 | 43.954 | 1985 | 43.938 | 1984 | 43.922 | 1983 | 43.906 | 1982 | 43.89 | 1981 | 43.874 | 1980 | 43.858 | 1979 | 43.842 | 1978 | 43.826 | 1977 | 43.81 | 1976 | 43.656 | 1975 | 43.291 | 1974 | 42.926 | 1973 | 42.563 | 1972 | 42.2 | 1971 | 41.838 | 1970 | 41.477 | 1969 | 41.117 | 1968 | 40.758 | 1967 | 40.399 | 1966 | 40.042 | 1965 | 39.686 | 1964 | 39.331 | 1963 | 38.977 | 1962 | 38.624 | 1961 | 38.272 | 1960 | 37.864 |
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