Year | Value | 2022 | 42.625 | 2021 | 41.985 | 2020 | 41.347 | 2019 | 40.712 | 2018 | 40.08 | 2017 | 39.451 | 2016 | 38.827 | 2015 | 38.206 | 2014 | 37.59 | 2013 | 36.979 | 2012 | 36.372 | 2011 | 35.771 | 2010 | 35.175 | 2009 | 34.585 | 2008 | 34 | 2007 | 33.017 | 2006 | 32.051 | 2005 | 31.099 | 2004 | 30.164 | 2003 | 29.244 | 2002 | 28.341 | 2001 | 27.455 | 2000 | 26.587 | 1999 | 25.735 | 1998 | 24.903 | 1997 | 24.088 | 1996 | 23.293 | 1995 | 22.514 | 1994 | 21.755 | 1993 | 21.015 | 1992 | 20.294 | 1991 | 19.59 | 1990 | 18.905 | 1989 | 18.239 | 1988 | 17.592 | 1987 | 16.962 | 1986 | 16.351 | 1985 | 15.757 | 1984 | 15.182 | 1983 | 14.94 | 1982 | 14.755 | 1981 | 14.572 | 1980 | 14.39 | 1979 | 14.211 | 1978 | 14.033 | 1977 | 13.857 | 1976 | 13.684 | 1975 | 13.511 | 1974 | 13.341 | 1973 | 13.173 | 1972 | 13.006 | 1971 | 12.841 | 1970 | 12.678 | 1969 | 12.517 | 1968 | 12.358 | 1967 | 12.2 | 1966 | 11.828 | 1965 | 11.466 | 1964 | 11.115 | 1963 | 10.772 | 1962 | 10.438 | 1961 | 10.114 | 1960 | 9.799 |
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