| Year | Value | | 2021 | 8,765,001 | | 2020 | 5,282,205 | | 2019 | 7,656,866 | | 2018 | 5,920,110 | | 2017 | 6,903,190 | | 2016 | 5,007,869 | | 2015 | 5,081,632 | | 2014 | 4,918,608 | | 2013 | 4,785,588 | | 2012 | 4,064,819.0227233 | | 2011 | 3,786,453.0639105 | | 2010 | 3,098,327 | | 2009 | 1,192,714 | | 2008 | 1,275,624 | | 2007 | 1,295,050 | | 2006 | 1,283,250 | | 2005 | 1,160,286 | | 2004 | 834,760 | | 2003 | 1,009,731 | | 2002 | 756,959 | | 2001 | 500,981 | | 2000 | 461,283 | | 1999 | 467,200 | | 1998 | 565,800 | | 1997 | 568,000 | | 1996 | 568,000 | | 1995 | 1,117,300 | | 1994 | 702,300 | | 1993 | 706,400 | | 1992 | 5,273,400 |
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