| Year | Value | | 2021 | 28,422,616 | | 2020 | 26,116,897 | | 2019 | 93,995,208.09 | | 2018 | 95,758,342 | | 2017 | 95,306,195 | | 2016 | 91,763,598 | | 2015 | 84,343,562 | | 2014 | 75,608,196 | | 2013 | 68,151,865 | | 2012 | 59,948,766.697648 | | 2011 | 50,342,891.802869 | | 2010 | 44,948,143.849412 | | 2009 | 31,761,631 | | 2004 | 14,314,326 | | 2003 | 11,609,840 | | 2002 | 9,667,005 | | 2001 | 7,675,845 | | 2000 | 6,893,085 | | 1999 | 5,840,300 | | 1998 | 5,263,700 | | 1997 | 4,720,400 | | 1996 | 4,063,500 | | 1995 | 3,550,500 | | 1994 | 3,368,700 | | 1993 | 2,936,300 | | 1992 | 2,508,800 | | 1991 | 2,041,800 | | 1990 | 1,685,900 | | 1989 | 1,481,700 | | 1988 | 1,329,500 | | 1987 | 1,093,000 | | 1986 | 935,200 | | 1985 | 717,500 | | 1984 | 674,200 | | 1983 | 601,800 | | 1982 | 569,800 | | 1981 | 577,800 | | 1980 | 521,500 | | 1979 | 456,500 | | 1978 | 374,500 | | 1977 | 299,800 | | 1976 | 240,100 | | 1975 | 173,000 | | 1974 | 127,500 |
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