Year	Dollars
1997-01-01	1506689
2002-01-01	3017588
2003-01-01	4682002
2004-01-01	3585902
2005-01-01	5786418
2006-01-01	6515979
2007-01-01	15232356
2008-01-01	38094616
2009-01-01	39326504
2010-01-01	46785297
2011-01-01	40510615
2012-01-01	49573846
2013-01-01	33888140
2014-01-01	20024268
2015-01-01	26453308
2016-01-01	26553142