Year | Value | 2022 | 67,536 | 2021 | 63,182 | 2020 | 59,262 | 2019 | 55,571 | 2018 | 51,924 | 2017 | 48,152 | 2016 | 44,010 | 2015 | 39,616 | 2014 | 35,310 | 2013 | 31,536 | 2012 | 28,978 | 2011 | 28,150 | 2010 | 29,018 | 2009 | 31,177 | 2008 | 33,869 | 2007 | 36,173 | 2006 | 37,475 | 2005 | 37,651 | 2004 | 36,928 | 2003 | 35,680 | 2002 | 34,325 | 2001 | 33,286 | 2000 | 32,813 | 1999 | 32,901 | 1998 | 33,347 | 1997 | 33,746 | 1996 | 33,642 | 1995 | 32,763 | 1994 | 31,017 | 1993 | 28,531 | 1992 | 25,721 | 1991 | 22,954 | 1990 | 20,469 | 1989 | 18,482 | 1988 | 17,027 | 1987 | 15,997 | 1986 | 15,364 | 1985 | 15,135 | 1984 | 15,312 | 1983 | 15,949 | 1982 | 16,913 | 1981 | 17,860 | 1980 | 18,534 | 1979 | 18,900 | 1978 | 18,942 | 1977 | 18,748 | 1976 | 18,546 | 1975 | 18,458 | 1974 | 18,432 | 1973 | 18,465 | 1972 | 18,537 | 1971 | 18,500 | 1970 | 18,255 | 1969 | 17,817 | 1968 | 17,194 | 1967 | 16,437 | 1966 | 15,715 | 1965 | 15,147 | 1964 | 14,715 | 1963 | 14,390 | 1962 | 14,224 | 1961 | 14,252 | 1960 | 14,492 |
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