| Year | Value | | 2023 | 6,560,725 | | 2022 | 6,370,612 | | 2021 | 6,182,422 | | 2020 | 6,001,349 | | 2019 | 5,912,685 | | 2018 | 5,770,751 | | 2017 | 5,626,689 | | 2016 | 5,479,855 | | 2015 | 5,330,837 | | 2014 | 5,187,402 | | 2013 | 5,052,130 | | 2012 | 4,930,871 | | 2011 | 4,842,381 | | 2010 | 4,787,016 | | 2009 | 4,743,786 | | 2008 | 4,711,073 | | 2007 | 4,688,640 | | 2006 | 4,655,305 | | 2005 | 4,632,102 | | 2004 | 4,628,134 | | 2003 | 4,612,494 | | 2002 | 4,584,189 | | 2001 | 4,554,502 | | 2000 | 4,513,388 | | 1999 | 4,443,547 | | 1998 | 4,336,765 | | 1997 | 4,211,605 | | 1996 | 4,083,952 | | 1995 | 3,960,873 | | 1994 | 3,874,415 | | 1993 | 3,828,446 | | 1992 | 3,766,152 | | 1991 | 3,653,494 |
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