Year Dollars 1997-01-01 369676 2002-01-01 1284165 2003-01-01 1242527 2004-01-01 1912924 2005-01-01 1438959 2006-01-01 2273516 2007-01-01 2701164 2008-01-01 3800053 2009-01-01 1491185 2010-01-01 581157 2011-01-01 5770209 2012-01-01 7961688 2013-01-01 5743459 2014-01-01 16570625 2015-01-01 10885599 2016-01-01 7447071