| Year | Value | | 2021 | 22,380 | | 2020 | 48,825 | | 2019 | 276,092 | | 2018 | 275,849 | | 2017 | 254,643 | | 2016 | 224,101 | | 2015 | 162,864 | | 2014 | 302,160 | | 2013 | 207,996 | | 2012 | 193,405 | | 2011 | 226,153.12662163 | | 2010 | 181,537.37171644 | | 2009 | 49,056 | | 2008 | 52,805 | | 2007 | 53,609 | | 2006 | 51,056 | | 2005 | 49,092 | | 2004 | 45,456 | | 2003 | 36,365 | | 2002 | 40,859 | | 2001 | 35,114 | | 2000 | 34,425 | | 1999 | 30,700 | | 1998 | 36,100 | | 1997 | 36,100 | | 1996 | 35,000 | | 1995 | 29,700 | | 1994 | 8,700 | | 1993 | 8,700 | | 1992 | 8,700 | | 1991 | 8,000 | | 1990 | 8,000 | | 1989 | 8,000 | | 1988 | 8,000 |
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