| Year | Value | | 2023 | 56,149,382 | | 2022 | 55,688,922 | | 2021 | 55,034,918 | | 2020 | 54,751,935 | | 2019 | 55,877,866 | | 2018 | 55,246,118 | | 2017 | 54,999,075 | | 2016 | 54,678,041 | | 2015 | 54,503,887 | | 2014 | 53,761,703 | | 2013 | 53,110,641 | | 2012 | 51,880,301 | | 2011 | 51,233,476 | | 2010 | 50,409,727 | | 2009 | 49,365,082 | | 2008 | 48,035,092 | | 2007 | 46,689,587 | | 2006 | 45,207,163 | | 2005 | 43,725,098 | | 2004 | 42,252,511 | | 2003 | 41,724,856 | | 2002 | 41,125,859 | | 2001 | 40,501,911 | | 2000 | 39,197,846 | | 1999 | 38,878,581 | | 1998 | 37,949,913 | | 1997 | 37,199,016 | | 1996 | 36,895,984 | | 1995 | 36,011,734 | | 1994 | 35,168,396 | | 1993 | 34,342,796 | | 1992 | 33,523,960 | | 1991 | 32,731,098 |
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