| Year | Value | | 2023 | 4,255,598 | | 2022 | 3,973,212 | | 2021 | 4,038,334 | | 2020 | 4,020,557 | | 2019 | 4,450,882 | | 2018 | 4,929,858 | | 2017 | 5,184,243 | | 2016 | 5,374,673 | | 2015 | 5,360,493 | | 2014 | 5,320,581 | | 2013 | 5,276,746 | | 2012 | 5,229,782 | | 2011 | 5,154,332 | | 2010 | 5,057,111 | | 2009 | 5,003,975 | | 2008 | 4,881,475 | | 2007 | 4,782,920 | | 2006 | 4,709,376 | | 2005 | 4,554,031 | | 2004 | 4,266,841 | | 2003 | 4,085,133 | | 2002 | 4,095,336 | | 2001 | 4,045,195 | | 2000 | 3,888,179 | | 1999 | 3,811,508 | | 1998 | 3,774,949 | | 1997 | 3,651,252 | | 1996 | 3,555,149 | | 1995 | 3,439,086 | | 1994 | 3,347,717 | | 1993 | 3,293,251 | | 1992 | 3,220,576 | | 1991 | 3,102,532 |
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