Year | Value | 2023 | 33,430,910 | 2022 | 32,614,163 | 2021 | 31,447,172 | 2020 | 29,873,073 | 2019 | 29,708,924 | 2018 | 29,899,860 | 2017 | 30,428,646 | 2016 | 30,927,659 | 2015 | 30,540,697 | 2014 | 30,655,760 | 2013 | 30,181,706 | 2012 | 29,544,119 | 2011 | 29,061,496 | 2010 | 28,739,910 | 2009 | 27,281,764 | 2008 | 26,485,023 | 2007 | 26,081,669 | 2006 | 24,954,020 | 2005 | 23,853,891 | 2004 | 22,756,745 | 2003 | 21,665,373 | 2002 | 20,589,710 | 2001 | 20,792,031 | 2000 | 20,772,661 | 1999 | 20,736,023 | 1998 | 19,483,789 | 1997 | 19,171,581 | 1996 | 18,866,025 | 1995 | 18,571,620 | 1994 | 18,400,048 | 1993 | 17,515,926 | 1992 | 16,784,931 | 1991 | 16,171,285 |
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