| Year | Value | | 2022 | 31,237,303 | | 2021 | 30,764,135 | | 2020 | 29,730,465 | | 2019 | 28,352,587 | | 2018 | 30,282,984 | | 2017 | 28,199,083 | | 2016 | 25,797,199 | | 2015 | 23,899,642 | | 2014 | 22,123,000 | | 2013 | 20,315,150 | | 2012 | 19,332,844 | | 2011 | 18,319,447 | | 2010 | 17,359,312 | | 2009 | 16,305,417 | | 2008 | 11,082,454 | | 2007 | 7,983,489 | | 2006 | 5,412,496 | | 2005 | 3,361,775 | | 2004 | 2,211,158 | | 2003 | 1,393,403 | | 2002 | 931,403 | | 2001 | 667,662 | | 2000 | 430,202 | | 1999 | 256,655 | | 1998 | 174,202 | | 1997 | 114,888 | | 1996 | 71,029 | | 1995 | 51,316 | | 1994 | 29,182 | | 1993 | 14,687 | | 1992 | 2,644 | | 1991 | 1,800 | | 1990 | 1,010 |
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