| Year | Value | | 2021 | 66,605 | | 2020 | 65,958 | | 2019 | 61,656 | | 2018 | 61,394 | | 2017 | 62,320 | | 2015 | 61,000 | | 2014 | 60,800 | | 2013 | 60,400 | | 2012 | 59,455 | | 2011 | 58,742 | | 2010 | 57,349 | | 2009 | 53,468 | | 2008 | 55,816 | | 2007 | 66,400 | | 2006 | 53,900 | | 2005 | 46,480 | | 2004 | 39,033 | | 2003 | 29,749 | | 2002 | 19,924 | | 2001 | 15,882 | | 2000 | 15,114 | | 1999 | 13,521 | | 1998 | 8,899 | | 1997 | 6,481 | | 1996 | 4,122 | | 1995 | 2,052 | | 1994 | 964 | | 1993 | 438 | | 1992 | 171 |
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