| Year | Value | | 2022 | 38,955 | | 2021 | 37,426 | | 2020 | 35,485 | | 2019 | 33,783 | | 2018 | 32,689 | | 2017 | 32,978 | | 2016 | 33,297 | | 2015 | 34,020 | | 2014 | 33,675 | | 2013 | 35,464 | | 2012 | 33,195 | | 2011 | 31,789 | | 2010 | 23,414 | | 2009 | 23,000 | | 2008 | 22,000 | | 2007 | 20,400 | | 2006 | 18,307 | | 2005 | 17,191 | | 2004 | 15,750 | | 2003 | 15,081 | | 2002 | 14,874 | | 2001 | 14,302 | | 2000 | 13,927 | | 1999 | 13,080 | | 1998 | 11,474 | | 1997 | 7,200 | | 1996 | 5,400 | | 1995 | 3,005 | | 1994 | 2,559 | | 1993 | 1,150 |
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