| Year | Value | | 2021 | 3,558,135.85 | | 2020 | 2,897,143.22 | | 2019 | 6,098,318 | | 2018 | 6,219,620.0608852 | | 2017 | 5,886,141.088 | | 2016 | 5,700,375 | | 2015 | 5,220,321 | | 2014 | 4,976,915.633456 | | 2013 | 4,574,583.4635518 | | 2012 | 4,357,526.4874614 | | 2011 | 4,158,415.0863254 | | 2010 | 3,940,298.1667931 | | 2009 | 2,986,969 | | 2008 | 2,852,615 | | 2007 | 2,893,009 | | 2006 | 2,670,479 | | 2005 | 2,441,945 | | 2004 | 2,360,942 | | 2003 | 2,065,419 | | 2002 | 2,027,711 | | 2001 | 2,197,664 | | 2000 | 2,077,309 | | 1999 | 2,043,100 | | 1998 | 1,992,200 | | 1997 | 1,985,900 | | 1996 | 1,925,100 | | 1995 | 1,804,800 | | 1994 | 1,828,700 | | 1993 | 1,695,900 | | 1992 | 1,692,000 | | 1991 | 1,559,100 | | 1990 | 1,603,200 | | 1989 | 1,628,300 | | 1988 | 1,595,600 | | 1987 | 1,575,700 | | 1986 | 1,539,900 | | 1985 | 1,537,900 | | 1984 | 1,538,700 | | 1983 | 1,443,000 | | 1982 | 1,356,200 | | 1981 | 1,335,400 | | 1980 | 1,329,500 | | 1979 | 1,264,700 | | 1978 | 1,180,300 | | 1977 | 1,135,000 | | 1976 | 1,094,400 | | 1975 | 1,010,000 | | 1974 | 922,300 | | 1973 | 903,200 | | 1972 | 848,000 | | 1971 | 785,500 | | 1970 | 851,900 |
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