Year	Dollars
1997-01-01	249616
2002-01-01	1016092
2003-01-01	2054501
2004-01-01	707337
2005-01-01	1436656
2006-01-01	4434559
2007-01-01	8667085
2008-01-01	11297680
2009-01-01	12559167
2010-01-01	15616906
2011-01-01	21581178
2013-01-01	10548817
2014-01-01	15276391
2015-01-01	11532063
2016-01-01	4611821