| Year | Value | | 2023 | 15,222,540 | | 2022 | 14,746,279 | | 2021 | 14,445,598 | | 2020 | 13,728,470 | | 2019 | 13,246,117 | | 2018 | 12,825,924 | | 2017 | 12,415,650 | | 2016 | 12,011,479 | | 2015 | 11,623,549 | | 2014 | 11,251,540 | | 2013 | 10,886,364 | | 2012 | 10,527,326 | | 2011 | 10,175,962 | | 2010 | 9,793,696 | | 2009 | 9,435,748 | | 2008 | 9,093,722 | | 2007 | 8,762,688 | | 2006 | 8,441,929 | | 2005 | 8,132,903 | | 2004 | 7,838,086 | | 2003 | 7,554,547 | | 2002 | 7,286,089 | | 2001 | 7,031,443 | | 2000 | 6,787,512 | | 1999 | 6,558,233 | | 1998 | 6,338,365 | | 1997 | 6,122,419 | | 1996 | 5,912,307 | | 1995 | 5,712,054 | | 1994 | 5,528,824 | | 1993 | 5,362,233 | | 1992 | 5,203,464 | | 1991 | 5,045,804 |
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