Year | Value | 2022 | 42.83 | 2021 | 43.224 | 2020 | 43.603 | 2019 | 43.969 | 2018 | 44.32 | 2017 | 44.657 | 2016 | 44.979 | 2015 | 45.286 | 2014 | 45.578 | 2013 | 45.855 | 2012 | 46.117 | 2011 | 46.363 | 2010 | 46.594 | 2009 | 46.81 | 2008 | 47.01 | 2007 | 47.21 | 2006 | 47.411 | 2005 | 47.611 | 2004 | 47.811 | 2003 | 48.012 | 2002 | 48.213 | 2001 | 48.413 | 2000 | 48.614 | 1999 | 48.815 | 1998 | 48.722 | 1997 | 48.412 | 1996 | 48.104 | 1995 | 47.794 | 1994 | 47.485 | 1993 | 47.176 | 1992 | 46.868 | 1991 | 46.559 | 1990 | 46.251 | 1989 | 45.943 | 1988 | 45.906 | 1987 | 46.105 | 1986 | 46.303 | 1985 | 46.502 | 1984 | 46.701 | 1983 | 46.861 | 1982 | 46.982 | 1981 | 47.103 | 1980 | 47.223 | 1979 | 47.345 | 1978 | 47.508 | 1977 | 47.706 | 1976 | 47.904 | 1975 | 48.103 | 1974 | 48.302 | 1973 | 48.629 | 1972 | 49.083 | 1971 | 49.538 | 1970 | 49.992 | 1969 | 50.037 | 1968 | 49.737 | 1967 | 49.436 | 1966 | 49.136 | 1965 | 48.836 | 1964 | 48.536 | 1963 | 48.236 | 1962 | 47.936 | 1961 | 47.636 | 1960 | 47.337 |
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