Year | Value | 2022 | 44.249 | 2021 | 44.573 | 2020 | 44.882 | 2019 | 45.178 | 2018 | 45.459 | 2017 | 45.727 | 2016 | 45.98 | 2015 | 46.219 | 2014 | 46.443 | 2013 | 46.668 | 2012 | 46.892 | 2011 | 47.117 | 2010 | 47.342 | 2009 | 47.567 | 2008 | 47.791 | 2007 | 48.017 | 2006 | 48.242 | 2005 | 48.467 | 2004 | 48.692 | 2003 | 48.918 | 2002 | 49.143 | 2001 | 49.22 | 2000 | 49.246 | 1999 | 49.272 | 1998 | 49.299 | 1997 | 49.325 | 1996 | 49.351 | 1995 | 49.378 | 1994 | 49.404 | 1993 | 49.431 | 1992 | 49.457 | 1991 | 49.483 | 1990 | 49.61 | 1989 | 49.771 | 1988 | 49.932 | 1987 | 50.093 | 1986 | 50.254 | 1985 | 50.416 | 1984 | 50.576 | 1983 | 50.737 | 1982 | 50.898 | 1981 | 51.059 | 1980 | 51.955 | 1979 | 53.099 | 1978 | 54.238 | 1977 | 55.373 | 1976 | 56.501 | 1975 | 57.626 | 1974 | 58.741 | 1973 | 59.847 | 1972 | 60.942 | 1971 | 62.028 | 1970 | 62.996 | 1969 | 63.919 | 1968 | 64.831 | 1967 | 65.734 | 1966 | 66.624 | 1965 | 67.503 | 1964 | 68.369 | 1963 | 69.224 | 1962 | 70.066 | 1961 | 70.893 | 1960 | 71.796 |
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