| Year | Value | | 2021 | 1,471 | | 2020 | 1,274 | | 2019 | 2,558 | | 2018 | 2,935 | | 2017 | 1,904 | | 2016 | 306 | | 2014 | 1,992 | | 2013 | 11,196 | | 2012 | 10,309.179137691 | | 2011 | 10,373.210941827 | | 2010 | 9,412 | | 2009 | 5,140 | | 2008 | 5,058 | | 2007 | 4,930 | | 2006 | 4,481 | | 2005 | 4,309 | | 2004 | 4,104 | | 2003 | 3,800 | | 2002 | 3,762 | | 2001 | 3,974 | | 2000 | 3,885 | | 1999 | 2,700 | | 1998 | 1,100 | | 1997 | 1,900 | | 1996 | 1,400 | | 1995 | 600 | | 1994 | 600 |
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