Year	Dollars
1992-01-01	8451046896
1997-01-01	11178215294
2002-01-01	9347259889
2003-01-01	9755230267
2004-01-01	10326086597
2005-01-01	10790769714
2006-01-01	12231411792
2007-01-01	14823250280
2008-01-01	16941376595
2009-01-01	13806420231
2010-01-01	15712052577
2011-01-01	16663382727
2012-01-01	16679053770
2013-01-01	16533891738
2014-01-01	17923642166
2015-01-01	16564185299
2016-01-01	15135739306