Year | Value | 2021 | 54,217,876 | 2020 | 34,133,108 | 2019 | 69,937,838 | 2018 | 64,569,640 | 2017 | 58,537,832 | 2016 | 53,313,307 | 2015 | 46,966,763 | 2014 | 39,570,522 | 2013 | 35,986,501.817 | 2012 | 32,909,408.724554 | 2011 | 29,538,937 | 2010 | 31,269,061 | 2009 | 15,728,171 | 2008 | 18,825,976 | 2007 | 20,952,513 | 2006 | 21,243,010 | 2005 | 21,857,658 | 2004 | 21,167,881 | 2003 | 20,661,206 | 2002 | 19,618,662 | 2001 | 20,172,824 | 2000 | 20,894,205 | 1999 | 20,561,100 | 1998 | 17,717,400 | 1997 | 17,266,500 | 1996 | 14,677,700 | 1995 | 14,968,800 | 1994 | 18,791,400 | 1993 | 16,484,800 | 1992 | 15,532,200 | 1991 | 14,901,000 | 1990 | 14,341,300 | 1989 | 12,689,000 | 1988 | 11,412,300 | 1987 | 13,504,900 | 1986 | 13,824,500 | 1985 | 15,364,400 | 1984 | 14,440,200 | 1983 | 13,923,500 | 1982 | 12,777,300 | 1981 | 13,853,300 | 1980 | 12,889,800 | 1979 | 11,381,500 | 1978 | 9,387,700 | 1977 | 8,238,200 | 1976 | 7,675,700 | 1975 | 6,522,900 | 1974 | 5,501,500 | 1973 | 4,589,600 | 1972 | 3,962,000 | 1971 | 3,107,300 | 1970 | 2,966,600 |
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