Year	Dollars
1997-01-01	21637319
2002-01-01	19628839
2003-01-01	23463009
2004-01-01	45008501
2005-01-01	127510294
2006-01-01	195333802
2007-01-01	87545871
2008-01-01	370507761
2009-01-01	209099437
2010-01-01	454221926
2011-01-01	421955325
2012-01-01	558747969
2013-01-01	589874136
2014-01-01	582079169
2015-01-01	426291551
2016-01-01	584562381