Year Dollars 1997-01-01 214123 2005-01-01 100164 2007-01-01 125839 2009-01-01 315943 2011-01-01 146910 2012-01-01 296273 2013-01-01 92370 2014-01-01 1388849 2015-01-01 1493216 2016-01-01 521026