Year | Value | 2022 | 43.231 | 2021 | 43.876 | 2020 | 44.525 | 2019 | 45.179 | 2018 | 45.838 | 2017 | 46.5 | 2016 | 47.165 | 2015 | 47.832 | 2014 | 48.5 | 2013 | 47.471 | 2012 | 46.445 | 2011 | 45.42 | 2010 | 44.4 | 2009 | 44.763 | 2008 | 45.125 | 2007 | 45.489 | 2006 | 45.854 | 2005 | 46.218 | 2004 | 46.583 | 2003 | 46.951 | 2002 | 47.318 | 2001 | 47.686 | 2000 | 48.053 | 1999 | 48.422 | 1998 | 48.79 | 1997 | 49.159 | 1996 | 49.527 | 1995 | 49.896 | 1994 | 50.236 | 1993 | 50.445 | 1992 | 50.653 | 1991 | 50.861 | 1990 | 51.069 | 1989 | 51.277 | 1988 | 51.485 | 1987 | 51.693 | 1986 | 51.901 | 1985 | 52.109 | 1984 | 52.316 | 1983 | 52.524 | 1982 | 52.732 | 1981 | 52.962 | 1980 | 53.292 | 1979 | 53.623 | 1978 | 53.952 | 1977 | 54.282 | 1976 | 54.61 | 1975 | 54.939 | 1974 | 55.267 | 1973 | 55.595 | 1972 | 55.922 | 1971 | 56.249 | 1970 | 56.655 | 1969 | 57.329 | 1968 | 57.999 | 1967 | 58.668 | 1966 | 59.333 | 1965 | 59.994 | 1964 | 60.651 | 1963 | 61.306 | 1962 | 61.956 | 1961 | 62.601 | 1960 | 63.193 |
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