Year | Value | 2023 | 31,252,665 | 2022 | 31,007,572 | 2021 | 30,717,681 | 2020 | 30,565,469 | 2019 | 30,684,163 | 2018 | 30,162,784 | 2017 | 29,365,218 | 2016 | 28,869,097 | 2015 | 28,378,066 | 2014 | 28,228,796 | 2013 | 27,980,622 | 2012 | 27,573,075 | 2011 | 27,614,797 | 2010 | 27,771,237 | 2009 | 27,780,297 | 2008 | 27,702,746 | 2007 | 27,665,862 | 2006 | 27,600,477 | 2005 | 27,475,128 | 2004 | 27,352,066 | 2003 | 27,284,790 | 2002 | 27,324,856 | 2001 | 27,530,796 | 2000 | 27,471,388 | 1999 | 27,533,339 | 1998 | 27,691,786 | 1997 | 27,661,496 | 1996 | 27,317,921 | 1995 | 27,120,615 | 1994 | 27,046,786 | 1993 | 26,920,696 | 1992 | 26,895,604 | 1991 | 26,608,230 |
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