Year	Dollars
1992-01-01	15359490
1997-01-01	13684433
2002-01-01	20174071
2003-01-01	17432551
2004-01-01	46514118
2005-01-01	12749965
2006-01-01	79241931
2007-01-01	208589490
2008-01-01	174483341
2009-01-01	238132396
2010-01-01	353437447
2011-01-01	450871262
2012-01-01	337309350
2013-01-01	720319228
2014-01-01	878956153
2015-01-01	512095146
2016-01-01	338524059