| Year | Value | | 2022 | 13,194,189 | | 2021 | 13,015,553 | | 2020 | 12,791,840 | | 2019 | 12,895,854 | | 2018 | 12,626,282 | | 2017 | 12,519,313 | | 2016 | 12,543,188 | | 2015 | 12,638,827 | | 2014 | 12,312,533 | | 2013 | 12,014,368 | | 2012 | 11,848,449 | | 2011 | 11,454,252 | | 2010 | 10,992,407 | | 2009 | 10,440,000 | | 2008 | 10,014,000 | | 2007 | 10,116,852 | | 2006 | 9,607,000 | | 2005 | 9,104,000 | | 2004 | 8,785,000 | | 2003 | 8,801,000 | | 2002 | 7,949,000 | | 2001 | 7,178,000 | | 2000 | 6,372,300 | | 1999 | 5,126,000 | | 1998 | 4,109,000 | | 1997 | 3,169,000 | | 1996 | 2,492,000 | | 1995 | 2,008,000 | | 1994 | 1,381,000 | | 1993 | 774,500 | | 1992 | 656,000 | | 1991 | 568,200 | | 1990 | 461,200 | | 1989 | 349,000 | | 1988 | 243,000 | | 1987 | 173,000 | | 1986 | 112,600 | | 1985 | 73,000 | | 1984 | 57,914 | | 1983 | 36,294 | | 1982 | 27,236 | | 1981 | 20,362 |
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