| Year | Value | | 2021 | 4,740,714 | | 2020 | 3,012,310 | | 2019 | 9,380,951 | | 2018 | 8,132,917 | | 2017 | 8,667,392 | | 2016 | 7,738,637 | | 2015 | 7,043,971 | | 2014 | 6,976,810 | | 2013 | 6,507,408 | | 2012 | 6,563,646.6759083 | | 2011 | 7,502,696.7452167 | | 2010 | 7,144,446 | | 2009 | 4,930,683 | | 2008 | 4,927,341 | | 2007 | 4,623,543 | | 2006 | 4,109,489 | | 2005 | 3,492,984 | | 2004 | 3,004,353 | | 2003 | 2,638,314 | | 2002 | 3,049,154 | | 2001 | 3,680,688 | | 2000 | 3,671,317 | | 1999 | 3,392,100 | | 1998 | 3,012,000 | | 1997 | 2,638,400 | | 1996 | 2,301,200 | | 1995 | 2,147,200 | | 1994 | 2,183,900 | | 1993 | 2,139,600 | | 1992 | 2,169,000 | | 1991 | 1,429,700 | | 1990 | 1,580,000 | | 1989 | 1,360,800 | | 1988 | 1,267,300 | | 1987 | 1,187,400 | | 1986 | 1,095,500 | | 1985 | 1,113,900 | | 1984 | 1,000,700 | | 1983 | 932,200 | | 1982 | 974,100 | | 1981 | 929,600 | | 1980 | 947,400 | | 1979 | 1,153,800 | | 1978 | 1,131,700 | | 1977 | 1,047,200 | | 1976 | 808,900 | | 1975 | 672,900 | | 1974 | 509,600 | | 1973 | 486,500 | | 1972 | 410,300 | | 1971 | 362,000 | | 1970 | 289,500 |
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