Year Dollars 2005-01-01 422922 2006-01-01 791092 2007-01-01 1245439 2008-01-01 6449714 2009-01-01 10738669 2010-01-01 13526211 2011-01-01 15646165 2012-01-01 9948211 2013-01-01 8406687 2014-01-01 8520841 2015-01-01 2373403 2016-01-01 3871512