| Year | Value | | 2023 | 13,425,064 | | 2022 | 13,023,244 | | 2021 | 12,202,063 | | 2020 | 11,881,326 | | 2019 | 12,402,025 | | 2018 | 12,225,526 | | 2017 | 12,069,182 | | 2016 | 11,918,706 | | 2015 | 11,709,257 | | 2014 | 11,279,335 | | 2013 | 11,793,700 | | 2012 | 11,293,832 | | 2011 | 11,067,848 | | 2010 | 10,832,192 | | 2009 | 10,551,825 | | 2008 | 10,402,784 | | 2007 | 10,244,513 | | 2006 | 10,077,549 | | 2005 | 9,916,026 | | 2004 | 9,747,177 | | 2003 | 9,556,009 | | 2002 | 9,355,943 | | 2001 | 9,145,785 | | 2000 | 8,926,622 | | 1999 | 8,701,391 | | 1998 | 8,477,091 | | 1997 | 8,233,015 | | 1996 | 7,968,414 | | 1995 | 7,681,165 | | 1994 | 7,429,272 | | 1993 | 7,149,879 | | 1992 | 6,870,956 | | 1991 | 6,633,340 |
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