Year	Dollars
1997-01-01	2875493
2002-01-01	6986273
2003-01-01	7140887
2004-01-01	5482468
2005-01-01	6572785
2006-01-01	6523174
2007-01-01	12653483
2008-01-01	11871590
2009-01-01	19473473
2010-01-01	15211623
2011-01-01	15028802
2012-01-01	28111609
2013-01-01	36017557
2014-01-01	38647995
2015-01-01	34293680
2016-01-01	26175696