Year | Value | 2021 | 41,210 | 2020 | 41,210 | 2019 | 41,210 | 2018 | 41,210 | 2017 | 41,210 | 2016 | 41,210 | 2015 | 41,210 | 2014 | 41,210 | 2013 | 41,210 | 2012 | 41,210 | 2011 | 41,266 | 2010 | 41,260 | 2009 | 41,400 | 2008 | 41,520 | 2007 | 41,660 | 2006 | 41,850 | 2005 | 42,020 | 2004 | 42,180 | 2003 | 42,270 | 2002 | 42,410 | 2001 | 42,590 | 2000 | 42,491 | 1999 | 42,366 | 1998 | 42,254 | 1997 | 42,142 | 1996 | 42,030 | 1995 | 41,918 | 1994 | 41,806 | 1993 | 41,694 | 1992 | 41,582 | 1991 | 41,470 | 1990 | 41,444 | 1989 | 41,408 | 1988 | 41,382 | 1987 | 41,346 | 1986 | 41,320 | 1985 | 41,164 | 1984 | 41,138 | 1983 | 41,102 | 1982 | 41,066 | 1981 | 41,030 | 1980 | 40,850 | 1979 | 40,700 | 1978 | 40,550 | 1977 | 40,400 | 1976 | 40,250 | 1975 | 40,090 | 1974 | 39,940 | 1973 | 39,530 | 1972 | 38,220 | 1971 | 37,020 | 1970 | 37,020 | 1969 | 35,670 | 1968 | 35,670 | 1967 | 35,670 | 1966 | 35,530 | 1965 | 35,530 | 1964 | 35,530 | 1963 | 35,630 | 1962 | 35,530 | 1961 | 35,530 |
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