Year | Value | 2022 | 46.66 | 2021 | 46.735 | 2020 | 46.786 | 2019 | 46.813 | 2018 | 46.816 | 2017 | 46.795 | 2016 | 46.75 | 2015 | 46.681 | 2014 | 46.587 | 2013 | 46.47 | 2012 | 46.329 | 2011 | 46.164 | 2010 | 45.975 | 2009 | 45.787 | 2008 | 45.598 | 2007 | 45.41 | 2006 | 45.221 | 2005 | 45.033 | 2004 | 44.845 | 2003 | 44.657 | 2002 | 44.47 | 2001 | 44.282 | 2000 | 44.095 | 1999 | 44.229 | 1998 | 44.411 | 1997 | 44.594 | 1996 | 44.776 | 1995 | 44.96 | 1994 | 45.143 | 1993 | 45.326 | 1992 | 45.509 | 1991 | 45.692 | 1990 | 45.876 | 1989 | 46.059 | 1988 | 46.243 | 1987 | 46.427 | 1986 | 46.611 | 1985 | 46.795 | 1984 | 46.979 | 1983 | 47.163 | 1982 | 47.347 | 1981 | 47.532 | 1980 | 47.716 | 1979 | 48.551 | 1978 | 49.49 | 1977 | 50.43 | 1976 | 51.369 | 1975 | 52.309 | 1974 | 53.246 | 1973 | 54.181 | 1972 | 55.112 | 1971 | 56.041 | 1970 | 56.965 | 1969 | 57.885 | 1968 | 58.797 | 1967 | 59.706 | 1966 | 60.608 | 1965 | 61.502 | 1964 | 62.387 | 1963 | 63.266 | 1962 | 64.136 | 1961 | 64.996 | 1960 | 65.845 |
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