| Year | Value | | 2023 | 12,284,010 | | 2022 | 12,182,515 | | 2021 | 12,285,624 | | 2020 | 11,951,801 | | 2019 | 12,161,541 | | 2018 | 11,926,569 | | 2017 | 11,696,824 | | 2016 | 11,796,246 | | 2015 | 11,854,873 | | 2014 | 11,827,998 | | 2013 | 11,708,832 | | 2012 | 11,546,217 | | 2011 | 11,533,785 | | 2010 | 11,445,798 | | 2009 | 11,361,433 | | 2008 | 11,268,009 | | 2007 | 11,058,308 | | 2006 | 10,841,391 | | 2005 | 10,618,681 | | 2004 | 10,395,656 | | 2003 | 10,184,411 | | 2002 | 9,977,433 | | 2001 | 9,872,499 | | 2000 | 9,687,664 | | 1999 | 9,450,152 | | 1998 | 9,198,775 | | 1997 | 8,997,880 | | 1996 | 8,716,924 | | 1995 | 8,562,676 | | 1994 | 8,261,500 | | 1993 | 8,110,699 | | 1992 | 7,873,803 | | 1991 | 7,631,546 |
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