| Year | Value | | 2021 | 8,576,845.076 | | 2020 | 6,687,141 | | 2019 | 11,315,014 | | 2018 | 11,130,969 | | 2017 | 11,082,914 | | 2016 | 11,000,033 | | 2015 | 10,820,701 | | 2014 | 10,846,743 | | 2013 | 11,008,795.336863 | | 2012 | 11,144,558.185577 | | 2011 | 11,303,511.615797 | | 2010 | 11,329,725.619256 | | 2009 | 10,380,744 | | 2008 | 10,254,839 | | 2007 | 11,004,451 | | 2006 | 10,781,083 | | 2005 | 10,988,079 | | 2004 | 10,554,981 | | 2003 | 8,825,200 | | 2002 | 8,302,667 | | 2001 | 9,517,253 | | 2000 | 9,784,346 | | 1999 | 8,831,000 | | 1998 | 8,142,200 | | 1997 | 8,253,700 | | 1996 | 8,337,600 | | 1995 | 7,965,000 | | 1994 | 7,503,500 | | 1993 | 6,671,500 | | 1992 | 6,836,800 | | 1991 | 6,881,700 | | 1990 | 7,195,400 | | 1989 | 6,892,300 | | 1988 | 7,009,400 | | 1987 | 6,731,800 | | 1986 | 6,449,000 | | 1985 | 5,905,800 | | 1984 | 5,549,800 | | 1983 | 5,136,200 | | 1982 | 4,916,100 | | 1981 | 5,011,900 | | 1980 | 5,344,700 | | 1979 | 5,399,500 | | 1978 | 5,206,200 | | 1977 | 5,143,900 | | 1976 | 5,043,400 | | 1975 | 4,939,900 | | 1974 | 5,022,300 | | 1973 | 5,407,100 | | 1972 | 5,276,600 | | 1971 | 5,291,700 | | 1970 | 5,404,400 |
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