Year	Dollars
1997-01-01	1222596
2002-01-01	2357983
2003-01-01	7614047
2004-01-01	4150130
2005-01-01	7397751
2006-01-01	8372943
2007-01-01	18315354
2008-01-01	14240374
2009-01-01	5593549
2010-01-01	12033119
2011-01-01	16020967
2012-01-01	13661765
2013-01-01	19681704
2014-01-01	40360193
2015-01-01	15018770
2016-01-01	18376994