Quarter	Billions of US Dollars
1987-01-01	0.4375
1987-04-01	-0.0198
1987-07-01	0.0890
1987-10-01	0.3598
1988-01-01	0.5841
1988-04-01	0.2313
1988-07-01	0.2892
1988-10-01	0.3205
1989-01-01	0.3062
1989-04-01	0.0422
1989-07-01	0.3377
1989-10-01	0.1051
1990-01-01	0.2230
1990-04-01	0.6560
1990-07-01	0.2240
1990-10-01	0.6817
1991-01-01	0.9354
1991-04-01	0.1344
1991-07-01	0.1463
1991-10-01	1.3961
1992-01-01	0.5367
1992-04-01	0.2414
1992-07-01	0.5423
1992-10-01	0.6831
1993-01-01	0.8852
1993-04-01	1.4837
1993-07-01	2.7122
1993-10-01	3.0107
1994-01-01	2.4039
1994-04-01	1.6759
1994-07-01	1.9733
1994-10-01	1.5558
1995-01-01	-1.0058
1995-04-01	1.2034
1995-07-01	2.7185
1995-10-01	0.7816
1996-01-01	1.4552
1996-04-01	3.8255
1996-07-01	3.1017
1996-10-01	3.3619
1997-01-01	1.4691
1997-04-01	6.4529
1997-07-01	7.7998
1997-10-01	3.6441
1998-01-01	0.7765
1998-04-01	3.7556
1998-07-01	0.7943
1998-10-01	1.6969
1999-01-01	0.0993
1999-04-01	0.3007
1999-07-01	1.3264
1999-10-01	-0.1638
2000-01-01	1.5865
2000-04-01	-2.8680
2000-07-01	-1.2805
2000-10-01	0.7543
2001-01-01	-0.1687
2001-04-01	0.8484
2001-07-01	1.6149
2001-10-01	3.4846
2002-01-01	2.9577
2002-04-01	6.6639
2002-07-01	3.7290
2002-10-01	5.6887
2003-01-01	1.3394
2003-04-01	3.6794
2003-07-01	8.5891
2003-10-01	3.9493
2004-01-01	4.6212
2004-04-01	3.5638
2004-07-01	5.3320
2004-10-01	6.9838
2005-01-01	6.4976
2005-04-01	6.2859
2005-07-01	6.9485
2005-10-01	6.3725
2006-01-01	12.6326
2006-04-01	7.9342
2006-07-01	8.2857
2006-10-01	29.1437
2007-01-01	16.2768
2007-04-01	23.1590
2007-07-01	3.3833
2007-10-01	15.4240
2008-01-01	-3.2704
2008-04-01	16.5340
2008-07-01	8.1240
2008-10-01	-6.9767
2009-01-01	-3.1334
2009-04-01	5.0652
2009-07-01	18.6457
2009-10-01	14.3729
2010-01-01	2.4102
2010-04-01	2.0073
2010-07-01	22.8952
2010-10-01	23.0141
2011-01-01	23.2833
2011-04-01	17.1699
2011-07-01	-0.6080
2011-10-01	11.1845
2012-01-01	23.3356
2012-04-01	14.3787
2012-07-01	14.1658
2012-10-01	29.8823
2013-01-01	24.0789
2013-04-01	47.8158
2013-07-01	11.0962
2013-10-01	26.7082
2014-01-01	25.5883
2014-04-01	43.1313
2014-07-01	13.8724
2014-10-01	26.1940
2015-01-01	23.9596
2015-04-01	46.2583