| Year | Value | | 2021 | 4,930,661.98 | | 2020 | 3,711,456.87 | | 2019 | 7,420,378.249 | | 2018 | 6,880,637 | | 2017 | 7,260,769 | | 2016 | 9,628,354 | | 2015 | 8,467,827 | | 2014 | 7,670,348.1854314 | | 2013 | 7,833,901.087732 | | 2012 | 7,973,906.3606728 | | 2011 | 7,940,545.0755121 | | 2010 | 6,588,114 | | 2009 | 5,303,268 | | 2008 | 5,605,758 | | 2007 | 5,439,144 | | 2006 | 5,714,831 | | 2005 | 5,364,134 | | 2004 | 5,097,477 | | 2003 | 4,522,110 | | 2002 | 4,141,009 | | 2001 | 6,011,849 | | 2000 | 5,293,541 | | 1999 | 5,850,000 | | 1998 | 5,414,100 | | 1997 | 5,882,500 | | 1996 | 5,375,000 | | 1995 | 5,342,600 | | 1994 | 5,663,700 | | 1993 | 5,647,100 | | 1992 | 5,680,600 | | 1991 | 5,197,700 | | 1990 | 5,180,200 | | 1989 | 5,009,000 | | 1988 | 4,889,400 | | 1987 | 4,434,400 | | 1986 | 4,127,200 | | 1985 | 3,839,400 | | 1984 | 3,641,900 | | 1983 | 3,466,900 | | 1982 | 3,328,800 | | 1981 | 3,096,800 | | 1980 | 3,029,200 | | 1979 | 2,773,100 | | 1978 | 2,656,300 | | 1977 | 2,303,700 | | 1976 | 1,947,400 | | 1975 | 1,451,800 | | 1974 | 1,047,700 | | 1973 | 805,200 | | 1972 | 625,200 | | 1971 | 1,085,600 | | 1970 | 1,335,900 |
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