Year Dollars 1997-01-01 21060 2002-01-01 20685 2005-01-01 218888 2007-01-01 205490 2008-01-01 166890 2009-01-01 613168 2010-01-01 134965 2011-01-01 145972 2012-01-01 244738 2013-01-01 479663 2014-01-01 184132 2015-01-01 125834 2016-01-01 331798