Year | Value | 2022 | 43.686 | 2021 | 43.008 | 2020 | 42.316 | 2019 | 41.612 | 2018 | 40.895 | 2017 | 40.167 | 2016 | 39.428 | 2015 | 38.678 | 2014 | 37.918 | 2013 | 37.149 | 2012 | 36.371 | 2011 | 35.585 | 2010 | 34.793 | 2009 | 34.01 | 2008 | 33.236 | 2007 | 32.469 | 2006 | 31.712 | 2005 | 30.965 | 2004 | 29.835 | 2003 | 28.688 | 2002 | 27.57 | 2001 | 26.48 | 2000 | 25.418 | 1999 | 24.383 | 1998 | 23.377 | 1997 | 22.401 | 1996 | 21.456 | 1995 | 20.537 | 1994 | 19.649 | 1993 | 18.791 | 1992 | 17.962 | 1991 | 17.161 | 1990 | 16.388 | 1989 | 15.645 | 1988 | 14.929 | 1987 | 14.24 | 1986 | 13.577 | 1985 | 12.941 | 1984 | 12.332 | 1983 | 11.745 | 1982 | 11.184 | 1981 | 10.646 | 1980 | 10.132 | 1979 | 9.639 | 1978 | 9.168 | 1977 | 8.717 | 1976 | 8.288 | 1975 | 7.876 | 1974 | 7.484 | 1973 | 7.11 | 1972 | 6.754 | 1971 | 6.413 | 1970 | 6.089 | 1969 | 5.781 | 1968 | 5.487 | 1967 | 5.207 | 1966 | 4.94 | 1965 | 4.687 | 1964 | 4.446 | 1963 | 4.217 | 1962 | 3.999 | 1961 | 3.792 | 1960 | 3.596 |
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