Year	Dollars
1997-01-01	2953205
2002-01-01	1578844
2003-01-01	704237
2004-01-01	532655
2005-01-01	757553
2006-01-01	1204706
2007-01-01	1723825
2008-01-01	3561245
2009-01-01	2858507
2010-01-01	5981493
2011-01-01	2411404
2012-01-01	2272989
2013-01-01	3112374
2014-01-01	4221258
2015-01-01	4071758
2016-01-01	2824909