| Year | Value | | 2023 | 12,835,664 | | 2022 | 12,613,143 | | 2021 | 12,284,952 | | 2020 | 12,143,520 | | 2019 | 12,233,395 | | 2018 | 12,005,756 | | 2017 | 11,883,376 | | 2016 | 11,686,335 | | 2015 | 11,542,970 | | 2014 | 11,333,727 | | 2013 | 10,965,443 | | 2012 | 10,798,940 | | 2011 | 10,640,971 | | 2010 | 10,457,034 | | 2009 | 10,290,930 | | 2008 | 10,333,969 | | 2007 | 10,238,237 | | 2006 | 10,127,672 | | 2005 | 9,955,416 | | 2004 | 9,854,723 | | 2003 | 9,522,640 | | 2002 | 9,598,529 | | 2001 | 9,418,202 | | 2000 | 9,196,778 | | 1999 | 8,763,097 | | 1998 | 8,559,838 | | 1997 | 8,936,034 | | 1996 | 8,628,884 | | 1995 | 8,391,050 | | 1994 | 8,144,075 | | 1993 | 7,879,140 | | 1992 | 7,754,409 | | 1991 | 7,620,209 |
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