Year Dollars 1992-01-01 51895186 1997-01-01 149292734 2002-01-01 203280059 2003-01-01 275444710 2004-01-01 399412435 2005-01-01 643594980 2006-01-01 618140336 2007-01-01 742240840 2008-01-01 951853408 2009-01-01 843317504 2010-01-01 759568892 2011-01-01 593222083 2012-01-01 827693671 2013-01-01 836237623 2014-01-01 1147383820 2015-01-01 763875988 2016-01-01 581645011