| Year | Value | | 2022 | 3,826,338 | | 2021 | 3,726,653 | | 2020 | 3,671,995 | | 2019 | 3,704,258 | | 2018 | 3,764,670 | | 2017 | 4,361,329 | | 2016 | 4,204,692 | | 2015 | 4,184,053 | | 2014 | 4,267,592 | | 2013 | 4,565,976 | | 2012 | 4,997,265 | | 2011 | 4,938,000 | | 2010 | 4,890,979 | | 2009 | 4,961,499 | | 2008 | 5,022,638 | | 2007 | 4,912,077 | | 2006 | 4,718,215 | | 2005 | 4,353,447 | | 2004 | 3,051,160 | | 2003 | 2,102,207 | | 2002 | 1,645,568 | | 2001 | 1,017,999 | | 2000 | 524,000 | | 1999 | 332,000 | | 1998 | 267,615 | | 1997 | 165,337 | | 1996 | 50,973 | | 1995 | 14,795 | | 1994 | 4,512 | | 1993 | 1,242 | | 1992 | 267 |
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