| Year | Value | | 2021 | 1,000 | | 2020 | 774 | | 2019 | 6,587 | | 2018 | 7,108 | | 2017 | 5,061 | | 2016 | 3,199 | | 2015 | 3,959 | | 2014 | 3,317 | | 2013 | 2,933 | | 2012 | 3,326 | | 2011 | 3,896 | | 2010 | 2,803 | | 2009 | 5,054 | | 2008 | 5,487 | | 2007 | 5,347 | | 2006 | 4,861 | | 2005 | 4,673 | | 2004 | 4,451 | | 2003 | 5,514 | | 2002 | 4,239 | | 2001 | 1,945 | | 2000 | 1,906 | | 1999 | 3,000 | | 1998 | 1,600 | | 1997 | 1,600 | | 1996 | 2,500 | | 1995 | 1,400 | | 1994 | 1,300 |
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