Year | Value | 2022 | 42.992 | 2021 | 43.348 | 2020 | 43.689 | 2019 | 44.015 | 2018 | 44.326 | 2017 | 44.622 | 2016 | 44.902 | 2015 | 45.167 | 2014 | 45.416 | 2013 | 45.65 | 2012 | 45.868 | 2011 | 46.07 | 2010 | 46.257 | 2009 | 46.443 | 2008 | 46.629 | 2007 | 46.816 | 2006 | 47.002 | 2005 | 47.189 | 2004 | 47.375 | 2003 | 47.563 | 2002 | 47.749 | 2001 | 47.947 | 2000 | 48.186 | 1999 | 48.426 | 1998 | 48.665 | 1997 | 48.905 | 1996 | 49.145 | 1995 | 49.385 | 1994 | 49.625 | 1993 | 49.864 | 1992 | 50.104 | 1991 | 50.344 | 1990 | 50.556 | 1989 | 50.76 | 1988 | 50.964 | 1987 | 51.168 | 1986 | 51.372 | 1985 | 51.576 | 1984 | 51.78 | 1983 | 51.984 | 1982 | 52.187 | 1981 | 52.714 | 1980 | 53.261 | 1979 | 53.809 | 1978 | 54.355 | 1977 | 54.9 | 1976 | 55.443 | 1975 | 55.987 | 1974 | 56.528 | 1973 | 57.067 | 1972 | 57.605 | 1971 | 58.142 | 1970 | 58.676 | 1969 | 59.404 | 1968 | 60.185 | 1967 | 60.964 | 1966 | 61.735 | 1965 | 62.501 | 1964 | 63.26 | 1963 | 64.015 | 1962 | 64.761 | 1961 | 65.5 | 1960 | 66.231 |
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