Year	Dollars
1992-01-01	3002269381
1997-01-01	3497038039
2002-01-01	3264917102
2003-01-01	3275592799
2004-01-01	3374008320
2005-01-01	3963788882
2006-01-01	4151437982
2007-01-01	5320008842
2008-01-01	5452926716
2009-01-01	4255139336
2010-01-01	4910410522
2011-01-01	5107048727
2012-01-01	4811430357
2013-01-01	5442277262
2014-01-01	5238011924
2015-01-01	5148820494