| Year | Value | | 2023 | 33,151,462 | | 2022 | 32,099,011 | | 2021 | 31,063,784 | | 2020 | 30,117,559 | | 2019 | 29,579,407 | | 2018 | 29,178,051 | | 2017 | 28,767,223 | | 2016 | 28,363,838 | | 2015 | 27,990,707 | | 2014 | 27,627,359 | | 2013 | 27,258,645 | | 2012 | 26,662,663 | | 2011 | 26,075,113 | | 2010 | 25,414,040 | | 2009 | 24,778,306 | | 2008 | 24,174,921 | | 2007 | 23,592,937 | | 2006 | 23,029,302 | | 2005 | 22,483,784 | | 2004 | 21,930,695 | | 2003 | 21,388,221 | | 2002 | 20,857,207 | | 2001 | 20,332,691 | | 2000 | 19,813,854 | | 1999 | 19,279,634 | | 1998 | 18,750,516 | | 1997 | 18,227,894 | | 1996 | 17,717,146 | | 1995 | 17,221,569 | | 1994 | 16,718,814 | | 1993 | 16,226,386 | | 1992 | 15,754,559 | | 1991 | 15,311,458 |
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