Year	Dollars
1992-01-01	4825915009
1997-01-01	12042729351
2002-01-01	11040053519
2003-01-01	12250239807
2004-01-01	12053053704
2005-01-01	13558648322
2006-01-01	16206193727
2007-01-01	17807774683
2008-01-01	18155774046
2009-01-01	12866140726
2010-01-01	14482089491
2011-01-01	16478508421
2012-01-01	16833024388
2013-01-01	17917543547
2014-01-01	19603668207
2015-01-01	20909720960
2016-01-01	19622976603