Year	Dollars
1997-01-01	4333766
2002-01-01	3281944
2003-01-01	3402213
2004-01-01	6261304
2005-01-01	10808187
2006-01-01	9875984
2007-01-01	15824789
2008-01-01	39322543
2009-01-01	23641063
2010-01-01	39969907
2011-01-01	22230885
2012-01-01	35956380
2013-01-01	37907289
2014-01-01	32128588
2015-01-01	15196843
2016-01-01	16554304