Year Dollars 2004-01-01 173796 2005-01-01 261784 2006-01-01 343485 2007-01-01 872695 2008-01-01 1410667 2009-01-01 3100747 2010-01-01 4496029 2011-01-01 6056919 2012-01-01 4766602 2013-01-01 6900423 2015-01-01 1001085 2016-01-01 1076859