Year | Value | 2022 | 34,909 | 2021 | 34,577 | 2020 | 34,410 | 2019 | 34,480 | 2018 | 34,799 | 2017 | 35,329 | 2016 | 36,087 | 2015 | 36,912 | 2014 | 37,583 | 2013 | 38,009 | 2012 | 38,058 | 2011 | 37,705 | 2010 | 37,012 | 2009 | 36,035 | 2008 | 34,941 | 2007 | 33,905 | 2006 | 32,945 | 2005 | 31,924 | 2004 | 30,741 | 2003 | 29,542 | 2002 | 28,457 | 2001 | 27,470 | 2000 | 26,556 | 1999 | 25,700 | 1998 | 24,832 | 1997 | 23,999 | 1996 | 23,252 | 1995 | 22,526 | 1994 | 22,002 | 1993 | 21,749 | 1992 | 22,555 | 1991 | 23,238 | 1990 | 22,671 | 1989 | 21,906 | 1988 | 21,107 | 1987 | 20,331 | 1986 | 19,578 | 1985 | 18,860 | 1984 | 18,180 | 1983 | 17,539 | 1982 | 16,943 | 1981 | 16,385 | 1980 | 15,850 | 1979 | 15,335 | 1978 | 14,832 | 1977 | 14,343 | 1976 | 13,876 | 1975 | 13,432 | 1974 | 13,115 | 1973 | 12,910 | 1972 | 12,801 | 1971 | 12,805 | 1970 | 12,816 | 1969 | 12,707 | 1968 | 12,488 | 1967 | 12,178 | 1966 | 11,766 | 1965 | 11,359 | 1964 | 10,980 | 1963 | 10,645 | 1962 | 10,345 | 1961 | 10,077 | 1960 | 9,836 |
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