Year	Dollars
1992-01-01	18787443
1997-01-01	21480818
2002-01-01	143362816
2003-01-01	131613953
2004-01-01	127291638
2005-01-01	135155638
2006-01-01	186716703
2007-01-01	252161865
2008-01-01	251144020
2009-01-01	294801440
2010-01-01	349294773
2011-01-01	390171766
2012-01-01	868794227
2013-01-01	607348757
2014-01-01	543004852
2015-01-01	449016037
2016-01-01	459923778