Year | Value | 2021 | 20,127,200 | 2020 | 14,597,294 | 2019 | 39,803,373 | 2018 | 31,226,848 | 2017 | 26,066,294 | 2016 | 21,399,963 | 2015 | 20,043,787 | 2014 | 16,482,060 | 2013 | 13,926,540 | 2012 | 12,289,555.076428 | 2011 | 13,729,553.534686 | 2010 | 12,477,063.176251 | 2009 | 2,952,885 | 2008 | 3,111,575 | 2007 | 3,133,574 | 2006 | 2,591,666 | 2005 | 2,735,214 | 2004 | 2,546,234 | 2003 | 2,260,849 | 2002 | 2,098,760 | 2001 | 2,023,385 | 2000 | 2,197,521 | 1999 | 1,943,500 | 1998 | 1,749,200 | 1997 | 1,634,700 | 1996 | 1,563,400 | 1995 | 1,310,900 | 1994 | 1,325,400 | 1993 | 1,216,900 | 1992 | 1,029,100 | 1991 | 910,700 | 1990 | 1,363,100 | 1989 | 1,316,300 | 1988 | 1,176,400 | 1987 | 1,231,400 | 1986 | 1,150,600 | 1985 | 1,116,100 | 1984 | 1,038,500 | 1983 | 957,300 | 1982 | 1,020,700 | 1981 | 1,017,000 | 1980 | 874,300 | 1979 | 830,200 | 1978 | 659,000 | 1977 | 555,000 | 1976 | 427,200 | 1975 | 414,100 | 1974 | 456,500 | 1973 | 330,000 | 1972 | 266,300 | 1971 | 268,200 | 1970 | 282,300 |
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