| Year | Value | | 2021 | 12,734,583 | | 2020 | 28,179,302.666 | | 2019 | 76,344,410 | | 2018 | 76,053,042.754 | | 2017 | 70,704,889 | | 2016 | 62,341,676 | | 2015 | 56,447,637 | | 2014 | 46,546,612.484507 | | 2013 | 43,029,150.6 | | 2012 | 36,392,469.354526 | | 2011 | 31,940,491.983851 | | 2010 | 28,780,723 | | 2009 | 19,618,735 | | 2008 | 19,993,134 | | 2007 | 21,191,723 | | 2006 | 20,102,408 | | 2005 | 18,902,629 | | 2004 | 20,342,582 | | 2003 | 16,622,502 | | 2002 | 18,111,892 | | 2001 | 17,662,418 | | 2000 | 17,392,091 | | 1999 | 15,950,500 | | 1998 | 15,015,400 | | 1997 | 14,235,800 | | 1996 | 14,078,300 | | 1995 | 12,771,400 | | 1994 | 11,404,700 | | 1993 | 10,196,900 | | 1992 | 8,546,800 | | 1991 | 7,708,600 | | 1990 | 8,201,400 | | 1989 | 7,364,500 | | 1988 | 6,235,900 | | 1987 | 5,179,600 | | 1986 | 4,370,000 | | 1985 | 4,065,900 | | 1984 | 3,671,300 | | 1983 | 3,357,000 | | 1982 | 3,154,900 | | 1981 | 2,834,600 | | 1980 | 2,459,000 | | 1979 | 2,088,900 | | 1978 | 1,773,800 | | 1977 | 1,331,500 | | 1976 | 1,633,800 | | 1975 | 1,616,500 | | 1974 | 1,261,000 | | 1973 | 1,021,000 | | 1972 | 785,600 | | 1971 | 713,100 | | 1970 | 764,200 |
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