Year	Dollars
1997-01-01	7856450
2002-01-01	18724639
2003-01-01	19385828
2004-01-01	23964008
2005-01-01	24467624
2006-01-01	32654376
2007-01-01	59521965
2008-01-01	106362647
2009-01-01	157721329
2010-01-01	144210588
2011-01-01	184094588
2012-01-01	243657227
2013-01-01	315027616
2014-01-01	308174627
2015-01-01	314504470
2016-01-01	271836891