| Year | Value | | 2022 | 13,758,317 | | 2021 | 12,500,000 | | 2020 | 12,270,000 | | 2019 | 11,700,000 | | 2018 | 10,700,000 | | 2017 | 10,540,000 | | 2016 | 10,570,000 | | 2015 | 10,570,000 | | 2014 | 9,500,000 | | 2013 | 9,500,000 | | 2012 | 9,225,000 | | 2011 | 9,200,000 | | 2010 | 9,111,000 | | 2009 | 9,022,000 | | 2008 | 8,982,000 | | 2007 | 8,902,000 | | 2006 | 8,403,765 | | 2005 | 7,757,000 | | 2004 | 7,221,955 | | 2003 | 6,618,367 | | 2002 | 6,300,008 | | 2001 | 5,500,621 | | 2000 | 4,400,000 | | 1999 | 2,880,000 | | 1998 | 2,147,000 | | 1997 | 1,672,442 | | 1996 | 1,047,582 | | 1995 | 445,456 | | 1994 | 133,425 | | 1993 | 64,484 | | 1992 | 36,104 | | 1991 | 23,000 | | 1990 | 15,240 |
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