Year	Dollars
1992-01-01	4436529855
1997-01-01	8537346643
2002-01-01	9496946150
2003-01-01	9649112802
2004-01-01	10463347086
2005-01-01	11421765431
2006-01-01	14289691796
2007-01-01	15626587914
2008-01-01	18207950441
2009-01-01	14237672758
2010-01-01	16625396618
2011-01-01	17430189533
2012-01-01	17520758906
2013-01-01	17572568026
2014-01-01	19641383186
2015-01-01	19153294573
2016-01-01	20850126821