Quarter	Billions of US Dollars
1987-01-01	0.02000
1987-07-01	0.01500
1988-04-01	-0.05000
1990-10-01	-0.01200
1993-07-01	0.05000
1994-01-01	-0.02000
1994-07-01	-0.01500
1997-10-01	0.20000
1998-04-01	0.12279
1998-07-01	-0.02105
1999-01-01	0.15000
1999-07-01	0.02500
2000-01-01	0.17926
2000-04-01	-0.00087
2000-07-01	-0.01494
2000-10-01	0.31253
2001-01-01	-0.06019
2001-04-01	-0.00001
2001-07-01	0.36000
2001-10-01	0.06843
2002-01-01	0.24521
2002-04-01	0.03226
2002-07-01	0.14559
2002-10-01	0.45005
2003-01-01	0.15060
2003-04-01	0.17098
2003-07-01	0.13619
2003-10-01	0.01469
2004-01-01	0.52309
2004-04-01	0.08019
2004-07-01	-0.00333
2004-10-01	-0.15718
2005-01-01	0.10642
2005-04-01	-0.20274
2005-07-01	-0.18937
2005-10-01	-0.02512
2006-01-01	-0.27236
2006-04-01	-0.01698
2006-07-01	0.00065
2006-10-01	-0.16377
2007-01-01	-0.20201
2007-04-01	0.01379
2007-07-01	0.00012
2007-10-01	0.03065
2008-01-01	-0.09066
2008-04-01	-0.06982
2008-07-01	0.09080
2008-10-01	-0.02230
2009-01-01	-0.29719
2009-04-01	-0.07689
2009-07-01	0.10879
2009-10-01	0.00476
2010-01-01	0.01013
2010-04-01	1.06445
2010-07-01	-0.00071
2010-10-01	-0.00358
2011-01-01	-0.02400
2011-04-01	0.55016
2011-07-01	0.10850
2011-10-01	0.07465
2012-01-01	0.10226
2012-04-01	1.29597
2012-07-01	-0.00258
2012-10-01	2.46689
2013-01-01	0.07056
2013-04-01	0.33612
2013-07-01	0.15738
2013-10-01	1.72363
2014-01-01	-0.09228
2014-04-01	1.52687
2014-07-01	0.02505
2014-10-01	0.05371
2015-01-01	5.16679
2015-04-01	-0.99408