Quarter	Billions of US Dollars
1987-04-01	0.08480
1988-07-01	-0.05359
1988-10-01	0.08280
1989-07-01	-0.06809
1989-10-01	-0.17000
1990-01-01	-0.00708
1990-04-01	-0.04622
1991-07-01	-0.06000
1992-04-01	-0.09292
1993-07-01	0.81376
1993-10-01	0.14467
1994-01-01	0.38554
1994-04-01	0.08422
1994-07-01	-0.21009
1994-10-01	0.08933
1995-01-01	-0.54206
1995-04-01	0.08851
1995-07-01	0.38523
1995-10-01	0.22051
1996-01-01	-0.13987
1996-04-01	-0.11455
1996-07-01	0.61932
1996-10-01	0.29997
1997-01-01	0.36982
1997-04-01	0.87135
1997-07-01	0.28794
1997-10-01	-0.07563
1998-01-01	0.63804
1998-04-01	0.35257
1998-07-01	0.18991
1998-10-01	-0.03388
1999-01-01	-0.18374
1999-04-01	0.13524
1999-07-01	0.64016
1999-10-01	-0.19381
2000-01-01	0.00056
2000-04-01	1.14316
2000-07-01	0.22721
2000-10-01	0.16434
2001-01-01	0.17956
2001-04-01	1.33731
2001-07-01	1.84371
2001-10-01	-0.40903
2002-01-01	0.39834
2002-04-01	0.32263
2002-07-01	0.13456
2002-10-01	-0.22946
2003-01-01	0.19908
2003-04-01	0.30693
2003-07-01	-0.32517
2003-10-01	0.00287
2004-01-01	0.52240
2004-04-01	0.39778
2004-07-01	1.12081
2004-10-01	1.71466
2005-01-01	0.44575
2005-04-01	0.06456
2005-07-01	1.94658
2005-10-01	0.49564
2006-01-01	-0.25633
2006-04-01	2.13624
2006-07-01	0.20590
2006-10-01	-0.19347
2007-01-01	0.49455
2007-04-01	2.95050
2007-07-01	0.28810
2007-10-01	-0.32995
2008-01-01	0.27655
2008-04-01	0.61604
2008-07-01	-0.20188
2008-10-01	-0.60864
2009-01-01	0.08138
2009-04-01	-1.26333
2009-07-01	0.68304
2009-10-01	1.07454
2010-01-01	0.29402
2010-04-01	-0.90720
2010-07-01	2.05393
2010-10-01	0.46229
2011-01-01	1.42265
2011-04-01	1.90609
2011-07-01	0.57048
2011-10-01	2.91966
2012-01-01	4.28940
2012-04-01	-0.85232
2012-07-01	1.21918
2012-10-01	2.66159
2013-01-01	2.30933
2013-04-01	5.32829
2013-07-01	4.48765
2013-10-01	3.79575
2014-01-01	0.76502
2014-04-01	4.77035
2014-07-01	1.36204
2014-10-01	-2.58266
2015-01-01	-2.78841
2015-04-01	-0.80263