Year	Dollars
1997-01-01	319990
2002-01-01	562633
2003-01-01	450903
2004-01-01	914111
2005-01-01	1497452
2006-01-01	1706709
2007-01-01	3693556
2008-01-01	2956523
2009-01-01	1884867
2010-01-01	1688328
2011-01-01	4304585
2012-01-01	8813696
2013-01-01	15734800
2014-01-01	14396609
2015-01-01	4966287
2016-01-01	5213255