Year | Value | 2022 | 40.81 | 2021 | 40.775 | 2020 | 40.76 | 2019 | 40.766 | 2018 | 40.793 | 2017 | 40.841 | 2016 | 40.91 | 2015 | 41 | 2014 | 41.111 | 2013 | 41.222 | 2012 | 41.332 | 2011 | 41.444 | 2010 | 41.555 | 2009 | 41.666 | 2008 | 41.777 | 2007 | 41.889 | 2006 | 42 | 2005 | 42.112 | 2004 | 42.223 | 2003 | 42.335 | 2002 | 42.447 | 2001 | 42.559 | 2000 | 42.67 | 1999 | 42.793 | 1998 | 42.916 | 1997 | 43.038 | 1996 | 43.161 | 1995 | 43.284 | 1994 | 43.407 | 1993 | 43.53 | 1992 | 43.653 | 1991 | 43.777 | 1990 | 43.9 | 1989 | 43.584 | 1988 | 43.269 | 1987 | 42.953 | 1986 | 42.639 | 1985 | 42.325 | 1984 | 42.012 | 1983 | 41.701 | 1982 | 41.917 | 1981 | 42.134 | 1980 | 42.351 | 1979 | 42.569 | 1978 | 42.787 | 1977 | 43.005 | 1976 | 43.224 | 1975 | 43.443 | 1974 | 43.662 | 1973 | 43.881 | 1972 | 44.1 | 1971 | 43.326 | 1970 | 42.556 | 1969 | 41.79 | 1968 | 41.028 | 1967 | 40.269 | 1966 | 39.516 | 1965 | 38.767 | 1964 | 38.025 | 1963 | 37.286 | 1962 | 36.555 | 1961 | 35.829 | 1960 | 35.111 |
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