| Year | Value | | 2022 | 4,480,469 | | 2021 | 4,402,213 | | 2020 | 4,375,699 | | 2019 | 4,404,652 | | 2018 | 4,388,476 | | 2017 | 4,315,580 | | 2016 | 4,414,347 | | 2015 | 4,415,660 | | 2014 | 4,461,352 | | 2013 | 4,721,015 | | 2012 | 4,971,351 | | 2011 | 5,115,140 | | 2010 | 4,928,352 | | 2009 | 4,675,017 | | 2008 | 4,554,777 | | 2007 | 5,034,582 | | 2006 | 4,395,200 | | 2005 | 3,649,700 | | 2004 | 2,835,500 | | 2003 | 2,537,300 | | 2002 | 2,312,600 | | 2001 | 1,755,000 | | 2000 | 1,033,000 | | 1999 | 295,000 | | 1998 | 182,500 | | 1997 | 120,420 | | 1996 | 64,943 | | 1995 | 33,688 | | 1994 | 21,664 | | 1993 | 11,382 | | 1992 | 6,320 | | 1991 | 2,019 | | 1990 | 240 |
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