Year | Value | 2022 | 46.091 | 2021 | 46.18 | 2020 | 46.24 | 2019 | 46.271 | 2018 | 46.274 | 2017 | 46.249 | 2016 | 46.194 | 2015 | 46.111 | 2014 | 46 | 2013 | 45.86 | 2012 | 45.72 | 2011 | 45.58 | 2010 | 45.315 | 2009 | 45.04 | 2008 | 44.889 | 2007 | 44.739 | 2006 | 44.588 | 2005 | 44.437 | 2004 | 44.287 | 2003 | 44.137 | 2002 | 43.987 | 2001 | 43.837 | 2000 | 43.767 | 1999 | 43.706 | 1998 | 43.645 | 1997 | 43.584 | 1996 | 43.524 | 1995 | 43.463 | 1994 | 43.402 | 1993 | 43.341 | 1992 | 43.281 | 1991 | 43.22 | 1990 | 43.509 | 1989 | 43.97 | 1988 | 44.432 | 1987 | 44.895 | 1986 | 45.359 | 1985 | 45.824 | 1984 | 46.289 | 1983 | 46.756 | 1982 | 47.223 | 1981 | 47.69 | 1980 | 48.362 | 1979 | 49.44 | 1978 | 50.518 | 1977 | 51.595 | 1976 | 52.669 | 1975 | 53.743 | 1974 | 54.813 | 1973 | 55.878 | 1972 | 56.936 | 1971 | 57.991 | 1970 | 58.943 | 1969 | 59.757 | 1968 | 60.565 | 1967 | 61.37 | 1966 | 62.167 | 1965 | 62.957 | 1964 | 63.74 | 1963 | 64.517 | 1962 | 65.286 | 1961 | 66.047 | 1960 | 66.536 |
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