Year	Dollars
1997-01-01	758250
2002-01-01	4553264
2003-01-01	6469152
2004-01-01	25361147
2005-01-01	10687365
2006-01-01	16449585
2007-01-01	19489314
2008-01-01	27003278
2009-01-01	33627321
2010-01-01	35625758
2011-01-01	45112649
2012-01-01	52217093
2013-01-01	91914481
2014-01-01	105296922
2015-01-01	280120349
2016-01-01	600340206