| Year | Value | | 2023 | 25,501,846 | | 2022 | 24,750,308 | | 2021 | 24,065,691 | | 2020 | 23,216,615 | | 2019 | 22,761,544 | | 2018 | 22,170,317 | | 2017 | 21,584,016 | | 2016 | 20,989,035 | | 2015 | 20,338,656 | | 2014 | 19,718,332 | | 2013 | 19,107,609 | | 2012 | 18,509,902 | | 2011 | 17,926,485 | | 2010 | 17,354,366 | | 2009 | 16,792,371 | | 2008 | 16,235,546 | | 2007 | 15,697,007 | | 2006 | 15,171,370 | | 2005 | 14,646,884 | | 2004 | 14,125,163 | | 2003 | 13,606,235 | | 2002 | 13,103,364 | | 2001 | 12,601,491 | | 2000 | 12,114,213 | | 1999 | 11,659,977 | | 1998 | 11,273,235 | | 1997 | 10,915,115 | | 1996 | 10,568,332 | | 1995 | 10,232,800 | | 1994 | 9,897,893 | | 1993 | 9,567,120 | | 1992 | 9,245,774 | | 1991 | 8,929,045 |
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