Year | Value | 2021 | 43.561 | 2020 | 44.007 | 2019 | 44.564 | 2018 | 44.992 | 2017 | 45.457 | 2016 | 46.156 | 2015 | 46.474 | 2014 | 46.747 | 2013 | 46.995 | 2012 | 47.282 | 2011 | 47.53 | 2010 | 47.696 | 2009 | 47.946 | 2008 | 48.242 | 2007 | 48.466 | 2006 | 48.739 | 2005 | 48.972 | 2004 | 49.232 | 2003 | 49.446 | 2002 | 49.688 | 2001 | 49.72 | 2000 | 49.901 | 1999 | 50.067 | 1998 | 50.194 | 1997 | 50.345 | 1996 | 50.1 | 1995 | 50.145 | 1994 | 50.262 | 1993 | 50.438 | 1992 | 50.214 | 1991 | 49.4 | 1990 | 49.008 | 1989 | 49.159 | 1988 | 49.057 | 1987 | 48.999 | 1986 | 48.871 | 1985 | 48.711 | 1984 | 48.461 | 1983 | 48.255 | 1982 | 48.024 | 1981 | 47.738 | 1980 | 47.314 | 1979 | 47.06 | 1978 | 46.763 | 1977 | 45.838 | 1976 | 45.681 | 1975 | 45.488 | 1974 | 45.321 | 1973 | 45.241 | 1972 | 45.201 | 1971 | 45.198 | 1970 | 45.182 | 1969 | 45.233 | 1968 | 45.305 | 1967 | 45.401 | 1966 | 45.524 | 1965 | 45.669 | 1964 | 45.803 | 1963 | 45.968 | 1962 | 46.168 | 1961 | 46.362 | 1960 | 46.604 |
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