Year	Dollars
1992-01-01	149243225
1997-01-01	313741519
2002-01-01	323069885
2003-01-01	310430041
2004-01-01	227063300
2005-01-01	162168043
2006-01-01	230602492
2007-01-01	102563922
2008-01-01	173523609
2009-01-01	239541405
2010-01-01	392341881
2011-01-01	425806347
2012-01-01	643752468
2013-01-01	580665618
2014-01-01	496374497
2015-01-01	446039790
2016-01-01	561397744