| Year | Value | | 2022 | 6,564,132 | | 2021 | 6,254,789 | | 2020 | 6,516,510 | | 2019 | 6,239,183 | | 2018 | 6,144,507 | | 2017 | 6,069,905 | | 2016 | 5,505,424 | | 2015 | 4,855,206 | | 2014 | 4,516,114 | | 2013 | 4,262,993 | | 2012 | 3,312,239 | | 2011 | 2,695,335 | | 2010 | 2,602,283 | | 2009 | 2,187,334 | | 2008 | 1,549,542 | | 2007 | 1,190,319 | | 2006 | 708,000 | | 2005 | 433,635 | | 2004 | 332,565 | | 2003 | 243,613 | | 2002 | 165,138 | | 2001 | 95,000 | | 2000 | 50,000 | | 1999 | 17,000 | | 1998 | 7,500 | | 1997 | 2,995 |
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