| Year | Value | | 2021 | 6,652,490 | | 2020 | 5,962,186 | | 2019 | 5,788,432 | | 2018 | 7,441,527 | | 2017 | 8,179,876 | | 2016 | 7,745,512 | | 2015 | 7,264,151 | | 2014 | 7,067,860 | | 2013 | 6,808,930 | | 2012 | 5,851,723 | | 2011 | 4,823,534 | | 2010 | 3,962,247 | | 2009 | 3,344,563 | | 2008 | 3,108,002 | | 2007 | 2,502,281 | | 2006 | 1,830,220 | | 2005 | 1,119,379 | | 2004 | 738,624 | | 2003 | 466,706 | | 2002 | 237,248 | | 2001 | 164,509 | | 2000 | 90,294 | | 1999 | 44,229 | | 1998 | 18,310 | | 1997 | 7,560 | | 1996 | 5,100 | | 1995 | 4,400 | | 1994 | 2,183 | | 1993 | 324 |
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