Year	Dollars
1997-01-01	301231
2002-01-01	3395776
2003-01-01	985298
2004-01-01	1809538
2005-01-01	6491304
2006-01-01	9690671
2007-01-01	6867429
2008-01-01	13740169
2009-01-01	2621503
2010-01-01	4509645
2011-01-01	6243348
2012-01-01	13225629
2013-01-01	13668283
2014-01-01	10991573
2015-01-01	4094964
2016-01-01	4765982