Year Dollars 1997-01-01 614399 2004-01-01 390424 2005-01-01 2271625 2007-01-01 968021 2008-01-01 1979438 2009-01-01 1723562 2010-01-01 3451518 2011-01-01 3840593 2012-01-01 5628928 2013-01-01 1266780 2014-01-01 4812770 2015-01-01 5407940