| Year | Value | | 2023 | 6,314,719 | | 2022 | 5,816,121 | | 2021 | 5,281,602 | | 2020 | 4,992,919 | | 2019 | 4,914,951 | | 2018 | 4,572,156 | | 2017 | 4,372,836 | | 2016 | 4,290,210 | | 2015 | 4,305,060 | | 2014 | 4,548,018 | | 2013 | 5,000,118 | | 2012 | 5,590,992 | | 2011 | 6,271,527 | | 2010 | 6,062,430 | | 2009 | 5,949,301 | | 2008 | 5,959,077 | | 2007 | 5,802,048 | | 2006 | 5,534,966 | | 2005 | 5,311,993 | | 2004 | 5,219,894 | | 2003 | 5,128,188 | | 2002 | 5,054,818 | | 2001 | 4,976,896 | | 2000 | 4,896,897 | | 1999 | 4,674,812 | | 1998 | 4,461,015 | | 1997 | 4,290,162 | | 1996 | 4,123,765 | | 1995 | 3,960,162 | | 1994 | 3,877,130 | | 1993 | 3,792,601 | | 1992 | 3,647,687 | | 1991 | 3,538,090 |
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