Year	Dollars
1992-01-01	181875043
1997-01-01	130132770
2002-01-01	94042044
2003-01-01	102843435
2004-01-01	158057862
2005-01-01	109398365
2006-01-01	125978339
2007-01-01	478546333
2008-01-01	708483121
2009-01-01	280950739
2010-01-01	374211834
2011-01-01	479689054
2012-01-01	365262995
2013-01-01	454526453
2014-01-01	516365416
2015-01-01	574388469
2016-01-01	521812052