Year	Dollars
1992-01-01	3279423796
1997-01-01	5319772949
2002-01-01	7812826073
2003-01-01	7838127306
2004-01-01	8403249500
2005-01-01	9885774631
2006-01-01	12896112192
2007-01-01	13525664508
2008-01-01	14458396859
2009-01-01	11140779171
2010-01-01	14723166754
2011-01-01	17005594238
2012-01-01	18723756048
2013-01-01	18499471692
2014-01-01	18627045387
2015-01-01	18188043792
2016-01-01	18711683081