| Year | Value | | 2022 | 456,864 | | 2021 | 437,270 | | 2020 | 421,384 | | 2019 | 413,446 | | 2018 | 411,361 | | 2017 | 401,231 | | 2016 | 401,613 | | 2015 | 383,919 | | 2014 | 370,047 | | 2013 | 356,264 | | 2012 | 352,114 | | 2011 | 344,085 | | 2010 | 341,077 | | 2009 | 339,715 | | 2008 | 336,922 | | 2007 | 326,098 | | 2006 | 301,922 | | 2005 | 283,108 | | 2004 | 290,068 | | 2003 | 279,670 | | 2002 | 260,438 | | 2001 | 248,131 | | 2000 | 214,896 | | 1999 | 172,614 | | 1998 | 104,280 | | 1997 | 65,368 | | 1996 | 46,805 | | 1995 | 30,883 | | 1994 | 21,845 | | 1993 | 17,409 | | 1992 | 15,251 | | 1991 | 12,889 | | 1990 | 10,010 | | 1989 | 7,893 | | 1988 | 6,519 | | 1987 | 5,008 | | 1986 | 2,642 |
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