Year Dollars 2002-01-01 221435 2005-01-01 468484 2006-01-01 710814 2007-01-01 1206998 2008-01-01 241287 2010-01-01 1558178 2012-01-01 367307 2013-01-01 969463 2014-01-01 174636 2015-01-01 263725 2016-01-01 498904