Year | Value | 2022 | 41.604 | 2021 | 42.028 | 2020 | 42.454 | 2019 | 42.881 | 2018 | 43.309 | 2017 | 43.739 | 2016 | 44.169 | 2015 | 44.6 | 2014 | 45.031 | 2013 | 45.463 | 2012 | 45.88 | 2011 | 46.28 | 2010 | 46.664 | 2009 | 47.031 | 2008 | 47.381 | 2007 | 47.715 | 2006 | 48.031 | 2005 | 48.33 | 2004 | 48.612 | 2003 | 48.877 | 2002 | 49.124 | 2001 | 49.354 | 2000 | 49.567 | 1999 | 49.762 | 1998 | 49.939 | 1997 | 50.099 | 1996 | 50.242 | 1995 | 50.367 | 1994 | 50.475 | 1993 | 50.565 | 1992 | 50.638 | 1991 | 50.693 | 1990 | 50.73 | 1989 | 50.75 | 1988 | 50.753 | 1987 | 50.738 | 1986 | 50.723 | 1985 | 50.708 | 1984 | 50.693 | 1983 | 50.678 | 1982 | 50.663 | 1981 | 50.648 | 1980 | 50.634 | 1979 | 50.619 | 1978 | 50.604 | 1977 | 50.718 | 1976 | 52.226 | 1975 | 53.734 | 1974 | 55.233 | 1973 | 56.723 | 1972 | 58.198 | 1971 | 59.663 | 1970 | 60.932 | 1969 | 62.154 | 1968 | 63.359 | 1967 | 64.551 | 1966 | 65.723 | 1965 | 66.877 | 1964 | 68.009 | 1963 | 69.123 | 1962 | 70.214 | 1961 | 71.283 | 1960 | 72.327 |
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