Year	Dollars
1997-01-01	1906390
2002-01-01	1284212
2003-01-01	7796563
2004-01-01	4067063
2005-01-01	6249496
2006-01-01	7364006
2007-01-01	4235326
2008-01-01	7758716
2009-01-01	6049034
2010-01-01	5708114
2011-01-01	6405724
2012-01-01	10460466
2013-01-01	35569882
2015-01-01	16750588
2016-01-01	5261364