Quarter	Billions of US Dollars
1987-01-01	0.03397
1987-04-01	0.03717
1987-07-01	0.10400
1987-10-01	-0.00553
1988-01-01	0.25925
1988-04-01	0.09638
1988-07-01	0.18183
1988-10-01	0.49312
1989-01-01	0.42174
1989-04-01	0.45923
1989-07-01	0.01960
1989-10-01	-0.08279
1990-01-01	0.06247
1990-04-01	0.58937
1990-07-01	0.40905
1990-10-01	0.59489
1991-01-01	0.29600
1991-04-01	0.18485
1991-07-01	0.53139
1991-10-01	-0.18333
1992-01-01	-0.18637
1992-04-01	0.64683
1992-07-01	-0.02082
1992-10-01	0.45798
1993-01-01	-0.15435
1993-04-01	-0.31619
1993-07-01	1.04601
1993-10-01	-0.64065
1994-01-01	0.77102
1994-04-01	-0.51734
1994-07-01	0.06799
1994-10-01	0.31299
1995-01-01	-0.54772
1995-04-01	-0.61548
1995-07-01	0.49432
1995-10-01	-0.47246
1996-01-01	1.00529
1996-04-01	0.89286
1996-07-01	-0.21421
1996-10-01	0.89765
1997-01-01	1.70673
1997-04-01	0.13841
1997-07-01	-0.21076
1997-10-01	0.70823
1998-01-01	-0.90273
1998-04-01	-0.80416
1998-07-01	0.07285
1998-10-01	-0.09569
1999-01-01	-1.03080
1999-04-01	0.08656
1999-07-01	0.78305
1999-10-01	-0.31553
2000-01-01	-0.90780
2000-04-01	0.22465
2000-07-01	-0.13458
2000-10-01	-0.18700
2001-01-01	-0.38395
2001-04-01	0.19788
2001-07-01	-0.51548
2001-10-01	0.34115
2002-01-01	1.00752
2002-04-01	0.25372
2002-07-01	-0.30317
2002-10-01	0.21371
2003-01-01	0.01869
2003-04-01	0.27122
2003-07-01	-0.30972
2003-10-01	0.15027
2004-01-01	0.74100
2004-04-01	1.47828
2004-07-01	0.52202
2004-10-01	0.41113
2005-01-01	0.82048
2005-04-01	0.47490
2005-07-01	0.57481
2005-10-01	-1.08558
2006-01-01	1.38408
2006-04-01	0.21742
2006-07-01	-0.24811
2006-10-01	-0.29564
2007-01-01	-0.84076
2007-04-01	-0.13725
2007-07-01	-0.03623
2007-10-01	-1.04429
2008-01-01	0.43188
2008-04-01	0.18297
2008-07-01	1.24881
2008-10-01	0.61117
2009-01-01	-0.23280
2009-04-01	2.02475
2009-07-01	0.50048
2009-10-01	0.06694
2010-01-01	1.27921
2010-04-01	0.24607
2010-07-01	1.45435
2010-10-01	1.98441
2011-01-01	2.84337
2011-04-01	0.64497
2011-07-01	-1.08323
2011-10-01	1.55310
2012-01-01	0.59437
2012-04-01	2.47603
2012-07-01	0.31197
2012-10-01	0.78504
2013-01-01	4.52390
2013-04-01	2.55869
2013-07-01	2.46619
2013-10-01	2.73161
2014-01-01	0.52510
2014-04-01	3.66001
2014-07-01	2.99568
2014-10-01	-0.76677
2015-01-01	-0.00706
2015-04-01	3.68335