Quarter	Billions of US Dollars
1997-01-01	0.00600
1997-04-01	0.00503
1998-01-01	-0.00600
1998-04-01	-0.00503
2002-01-01	0.03676
2002-04-01	0.02591
2002-07-01	0.00279
2002-10-01	0.03514
2003-01-01	0.01668
2003-04-01	0.00969
2003-07-01	0.00207
2003-10-01	0.00348
2004-01-01	0.00709
2004-04-01	-0.00011
2004-07-01	-0.00053
2004-10-01	0.00450
2005-01-01	0.00250
2005-04-01	-0.00054
2005-07-01	0.00286
2005-10-01	0.00129
2006-01-01	0.00226
2006-04-01	0.00014
2006-07-01	0.00061
2006-10-01	0.00319
2007-01-01	0.00210
2007-04-01	0.00157
2007-07-01	0.00313
2007-10-01	-0.05125
2008-01-01	-0.00336
2008-04-01	0.04070
2008-07-01	-0.00499
2009-01-01	-0.10693
2009-04-01	-0.01690
2009-07-01	-0.03494
2009-10-01	0.00000
2010-07-01	-0.00926