Year	Dollars
1992-01-01	34291072
1997-01-01	56350754
2002-01-01	142698146
2003-01-01	119495646
2004-01-01	208650483
2005-01-01	178443673
2006-01-01	192394920
2007-01-01	305569775
2008-01-01	303672412
2009-01-01	382856005
2010-01-01	426918545
2011-01-01	540638953
2012-01-01	478999916
2013-01-01	438463246
2014-01-01	516276435
2015-01-01	603076071
2016-01-01	478269771