| Year | Value | | 2021 | 871,685 | | 2020 | 1,240,391 | | 2019 | 5,582,446 | | 2018 | 5,882,376 | | 2017 | 5,403,577 | | 2016 | 5,284,585 | | 2015 | 4,911,730 | | 2014 | 4,756,131 | | 2013 | 4,793,393.4 | | 2012 | 4,616,417 | | 2011 | 3,665,394 | | 2010 | 3,008,322.6918876 | | 2009 | 2,417,713 | | 2008 | 2,951,506 | | 2007 | 3,206,766 | | 2006 | 3,100,832 | | 2005 | 2,817,778 | | 2004 | 2,412,889 | | 2003 | 1,957,606 | | 2002 | 1,740,807 | | 2001 | 1,718,331 | | 2000 | 1,755,567 | | 1999 | 1,421,500 | | 1998 | 1,212,500 | | 1997 | 1,231,900 | | 1996 | 1,170,700 | | 1995 | 1,155,700 | | 1994 | 1,066,800 | | 1993 | 993,800 | | 1992 | 1,045,600 | | 1991 | 892,700 | | 1990 | 891,800 | | 1989 | 744,500 | | 1988 | 694,300 | | 1987 | 586,900 | | 1986 | 611,400 | | 1985 | 698,600 | | 1984 | 681,300 | | 1983 | 616,500 | | 1982 | 572,700 | | 1981 | 405,200 | | 1980 | 235,000 | | 1979 | 105,300 | | 1978 | 100,000 | | 1977 | 181,000 | | 1976 | 127,700 | | 1975 | 117,300 | | 1974 | 107,700 | | 1973 | 108,500 | | 1972 | 116,000 | | 1971 | 116,000 | | 1970 | 104,600 |
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