Year | Value | 2022 | 41.781 | 2021 | 42.122 | 2020 | 42.447 | 2019 | 42.758 | 2018 | 43.053 | 2017 | 43.333 | 2016 | 43.597 | 2015 | 43.845 | 2014 | 44.077 | 2013 | 44.294 | 2012 | 44.494 | 2011 | 44.678 | 2010 | 44.845 | 2009 | 45.013 | 2008 | 45.181 | 2007 | 45.349 | 2006 | 45.517 | 2005 | 45.685 | 2004 | 45.853 | 2003 | 46.021 | 2002 | 46.19 | 2001 | 46.358 | 2000 | 46.572 | 1999 | 46.802 | 1998 | 47.032 | 1997 | 47.261 | 1996 | 47.491 | 1995 | 47.721 | 1994 | 47.952 | 1993 | 48.182 | 1992 | 48.412 | 1991 | 48.643 | 1990 | 48.963 | 1989 | 49.313 | 1988 | 49.662 | 1987 | 50.013 | 1986 | 50.363 | 1985 | 50.713 | 1984 | 51.063 | 1983 | 51.413 | 1982 | 51.763 | 1981 | 52.113 | 1980 | 52.715 | 1979 | 53.403 | 1978 | 54.089 | 1977 | 54.773 | 1976 | 55.455 | 1975 | 56.136 | 1974 | 56.814 | 1973 | 57.489 | 1972 | 58.161 | 1971 | 58.832 | 1970 | 59.804 | 1969 | 60.87 | 1968 | 61.924 | 1967 | 62.97 | 1966 | 64.003 | 1965 | 65.023 | 1964 | 66.028 | 1963 | 67.021 | 1962 | 67.999 | 1961 | 68.96 | 1960 | 69.846 |
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