Year Dollars 1997-01-01 19675 2002-01-01 24721 2003-01-01 77285 2004-01-01 122092 2005-01-01 140173 2006-01-01 377492 2007-01-01 170634 2008-01-01 200030 2009-01-01 511363 2010-01-01 1323458 2011-01-01 858605 2012-01-01 599195 2013-01-01 457580 2014-01-01 510554 2015-01-01 899954 2016-01-01 657040