| Year | Value | | 2022 | 4,741,473 | | 2021 | 4,691,277 | | 2020 | 4,551,276 | | 2019 | 4,526,326 | | 2018 | 4,459,173 | | 2017 | 5,097,569 | | 2016 | 5,116,736 | | 2015 | 5,165,474 | | 2014 | 5,497,094 | | 2013 | 5,267,947 | | 2012 | 4,995,459 | | 2011 | 4,757,425 | | 2010 | 4,437,158 | | 2009 | 4,111,560 | | 2008 | 3,507,816 | | 2007 | 3,004,323 | | 2006 | 2,330,011 | | 2005 | 1,154,923 | | 2004 | 599,768 | | 2003 | 497,530 | | 2002 | 513,528 | | 2001 | 519,991 | | 2000 | 410,787 | | 1999 | 319,131 | | 1998 | 151,341 | | 1997 | 99,235 | | 1996 | 78,601 | | 1995 | 39,904 | | 1994 | 6,825 | | 1993 | 4,969 | | 1992 | 1,712 |
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