| Year | Value | | 2023 | 15,829,771 | | 2022 | 15,363,211 | | 2021 | 14,889,869 | | 2020 | 14,403,570 | | 2019 | 14,118,618 | | 2018 | 13,715,256 | | 2017 | 13,321,070 | | 2016 | 12,935,229 | | 2015 | 12,558,421 | | 2014 | 12,174,101 | | 2013 | 11,791,420 | | 2012 | 11,412,154 | | 2011 | 11,039,128 | | 2010 | 10,675,098 | | 2009 | 10,322,072 | | 2008 | 9,981,264 | | 2007 | 9,653,351 | | 2006 | 9,336,798 | | 2005 | 9,031,778 | | 2004 | 8,745,514 | | 2003 | 8,470,330 | | 2002 | 8,206,506 | | 2001 | 7,946,565 | | 2000 | 7,698,015 | | 1999 | 7,460,288 | | 1998 | 7,229,239 | | 1997 | 7,003,859 | | 1996 | 6,784,268 | | 1995 | 6,569,585 | | 1994 | 6,363,608 | | 1993 | 6,162,198 | | 1992 | 5,967,832 | | 1991 | 5,779,842 |
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