| Year | Value | | 2021 | 4,732,454.516 | | 2020 | 4,901,478.069 | | 2019 | 7,629,160 | | 2018 | 7,387,203.8414897 | | 2017 | 6,919,472.67 | | 2016 | 6,431,220 | | 2015 | 5,872,462 | | 2014 | 5,435,979.6917599 | | 2013 | 4,868,207.3179955 | | 2012 | 4,537,127.0008198 | | 2011 | 4,196,284.4631813 | | 2010 | 3,844,391.0266723 | | 2009 | 3,092,984 | | 2008 | 2,798,473 | | 2007 | 2,702,754 | | 2006 | 2,454,357 | | 2005 | 2,219,532 | | 2004 | 2,067,761 | | 2003 | 1,586,155 | | 2002 | 1,615,064 | | 2001 | 1,522,837 | | 2000 | 1,215,806 | | 1999 | 1,149,800 | | 1998 | 1,241,700 | | 1997 | 1,223,700 | | 1996 | 1,304,200 | | 1995 | 1,138,400 | | 1994 | 1,039,100 | | 1993 | 910,000 | | 1992 | 889,900 | | 1991 | 823,400 | | 1990 | 804,100 | | 1989 | 740,800 | | 1988 | 765,400 | | 1987 | 699,800 | | 1986 | 637,600 | | 1985 | 604,300 | | 1984 | 591,400 | | 1983 | 489,500 | | 1982 | 478,800 | | 1981 | 460,300 | | 1980 | 420,500 | | 1979 | 410,900 | | 1978 | 364,500 | | 1977 | 355,500 | | 1976 | 352,000 | | 1975 | 335,000 | | 1974 | 305,900 |
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