Year | Value | 2021 | 14,702,405.542 | 2020 | 11,609,007.87 | 2019 | 22,822,190.733 | 2018 | 22,460,256.787081 | 2017 | 22,182,317.92 | 2016 | 22,020,267 | 2015 | 21,455,548 | 2014 | 21,081,416.367649 | 2013 | 21,039,809.298492 | 2012 | 20,984,277.381898 | 2011 | 21,094,558.129247 | 2010 | 20,927,396.791636 | 2009 | 18,650,104 | 2008 | 18,688,257 | 2007 | 19,348,839 | 2006 | 18,809,257 | 2005 | 18,709,113 | 2004 | 18,407,015 | 2003 | 16,602,403 | 2002 | 16,063,702 | 2001 | 17,392,600 | 2000 | 17,624,505 | 1999 | 16,409,600 | 1998 | 15,371,000 | 1997 | 15,188,600 | 1996 | 14,663,400 | 1995 | 13,849,900 | 1994 | 13,152,600 | 1993 | 12,024,600 | 1992 | 11,936,900 | 1991 | 11,517,500 | 1990 | 11,832,500 | 1989 | 11,302,500 | 1988 | 11,155,300 | 1987 | 10,633,200 | 1986 | 10,152,300 | 1985 | 9,443,800 | 1984 | 8,971,400 | 1983 | 8,508,000 | 1982 | 8,193,100 | 1981 | 8,176,300 | 1980 | 8,640,600 | 1979 | 8,666,100 | 1978 | 8,367,500 | 1977 | 8,158,300 | 1976 | 7,824,900 | 1975 | 7,633,500 | 1974 | 7,796,100 | 1973 | 8,409,000 | 1972 | 8,254,700 | 1971 | 8,263,700 | 1970 | 8,147,600 |
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