Year	Dollars
1997-01-01	1087298
2002-01-01	8222307
2003-01-01	23305160
2004-01-01	7872457
2005-01-01	6009243
2007-01-01	12094516
2008-01-01	10947315
2009-01-01	78599643
2010-01-01	31683220
2011-01-01	34080253
2013-01-01	103667683
2014-01-01	200247889
2015-01-01	210107582
2016-01-01	301102181