Year Dollars 1997-01-01 35835 2004-01-01 320206 2006-01-01 234732 2007-01-01 91509 2008-01-01 208558 2011-01-01 118161 2012-01-01 530338 2013-01-01 1194304 2014-01-01 504775 2015-01-01 1364192 2016-01-01 184422