| Year | Value | | 2023 | 15,207,841 | | 2022 | 14,654,340 | | 2021 | 14,040,289 | | 2020 | 13,560,715 | | 2019 | 13,326,120 | | 2018 | 12,969,409 | | 2017 | 12,615,848 | | 2016 | 12,262,367 | | 2015 | 11,915,162 | | 2014 | 11,593,875 | | 2013 | 11,362,549 | | 2012 | 11,137,039 | | 2011 | 10,921,196 | | 2010 | 10,717,206 | | 2009 | 10,545,037 | | 2008 | 10,383,577 | | 2007 | 10,202,256 | | 2006 | 10,012,882 | | 2005 | 9,685,154 | | 2004 | 9,366,565 | | 2003 | 9,055,477 | | 2002 | 8,755,044 | | 2001 | 8,464,682 | | 2000 | 8,230,284 | | 1999 | 7,990,074 | | 1998 | 7,764,800 | | 1997 | 7,545,658 | | 1996 | 7,360,266 | | 1995 | 7,186,936 | | 1994 | 6,944,733 | | 1993 | 6,672,568 | | 1992 | 6,443,336 | | 1991 | 6,252,002 |
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