| Year | Value | | 2023 | 11,000,000 | | 2022 | 11,100,000 | | 2021 | 10,800,000 | | 2020 | 10,300,000 | | 2019 | 10,800,000 | | 2018 | 10,300,000 | | 2017 | 10,100,000 | | 2016 | 10,200,000 | | 2015 | 10,700,000 | | 2014 | 10,600,000 | | 2013 | 10,100,000 | | 2012 | 10,100,000 | | 2011 | 10,100,000 | | 2010 | 9,100,000 | | 2009 | 7,760,000 | | 2008 | 6,550,000 | | 2007 | 4,520,000 | | 2006 | 3,320,000 | | 2005 | 2,240,000 | | 2004 | 1,460,000 | | 2003 | 1,060,000 | | 2002 | 794,200 | | 2001 | 730,000 | | 2000 | 420,400 | | 1999 | 370,000 | | 1998 | 65,000 | | 1997 | 40,000 | | 1996 | 17,000 | | 1995 | 6,000 | | 1994 | 500 |
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