| Year | Value | | 2021 | 20,067,143.633 | | 2020 | 14,105,839.7975 | | 2019 | 50,957,868.602 | | 2018 | 51,473,905 | | 2017 | 51,825,549 | | 2016 | 55,672,453 | | 2015 | 58,636,668 | | 2014 | 57,789,383 | | 2013 | 51,925,707 | | 2012 | 49,192,941 | | 2011 | 46,260,220 | | 2010 | 41,153,081 | | 2004 | 11,623,925 | | 2003 | 11,586,025 | | 2002 | 12,421,220 | | 2001 | 13,123,426 | | 2000 | 13,354,314 | | 1999 | 12,917,600 | | 1998 | 11,877,700 | | 1997 | 11,326,900 | | 1996 | 9,879,000 | | 1995 | 9,498,000 | | 1994 | 10,807,700 | | 1993 | 9,719,000 | | 1992 | 9,923,500 | | 1991 | 9,826,800 | | 1990 | 11,402,500 | | 1989 | 10,855,000 | | 1988 | 10,211,900 | | 1987 | 9,428,800 | | 1986 | 8,713,900 | | 1985 | 7,609,600 | | 1984 | 7,335,200 | | 1983 | 6,590,800 | | 1982 | 6,091,100 | | 1981 | 5,632,000 | | 1980 | 5,209,400 | | 1979 | 5,193,400 | | 1978 | 4,360,900 | | 1977 | 3,851,800 | | 1976 | 3,908,900 | | 1975 | 3,464,700 | | 1974 | 3,350,300 | | 1973 | 3,225,900 | | 1972 | 3,014,000 | | 1971 | 2,913,800 | | 1970 | 2,550,000 |
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