Quarter	Billions of US Dollars
1987-01-01	0.0381
1987-04-01	0.1082
1987-07-01	0.3683
1987-10-01	0.0571
1988-01-01	1.0112
1988-04-01	0.2383
1988-07-01	0.6610
1988-10-01	0.3898
1989-01-01	0.9012
1989-04-01	0.3087
1989-07-01	0.2037
1989-10-01	0.1278
1990-01-01	0.3165
1990-04-01	0.1299
1990-07-01	0.5132
1990-10-01	0.4676
1991-01-01	0.0037
1991-04-01	1.3638
1991-07-01	0.1605
1991-10-01	0.1122
1992-01-01	0.6380
1992-04-01	0.3414
1992-07-01	-0.0375
1992-10-01	0.1630
1993-01-01	-0.3761
1993-04-01	0.0549
1993-07-01	1.6837
1993-10-01	1.0904
1994-01-01	0.6828
1994-04-01	0.7639
1994-07-01	0.3710
1994-10-01	0.8038
1995-01-01	0.0842
1995-04-01	1.5395
1995-07-01	2.1333
1995-10-01	-0.1443
1996-01-01	1.6068
1996-04-01	2.4888
1996-07-01	0.9746
1996-10-01	2.7707
1997-01-01	1.2901
1997-04-01	1.0188
1997-07-01	1.0649
1997-10-01	0.5038
1998-01-01	4.1896
1998-04-01	-0.8095
1998-07-01	-3.5020
1998-10-01	1.8420
1999-01-01	0.4989
1999-04-01	1.4595
1999-07-01	2.3761
1999-10-01	1.4259
2000-01-01	-0.4456
2000-04-01	3.5306
2000-07-01	3.1320
2000-10-01	5.2146
2001-01-01	4.3235
2001-04-01	3.3267
2001-07-01	2.1172
2001-10-01	2.9037
2002-01-01	1.2754
2002-04-01	3.9757
2002-07-01	-8.8880
2002-10-01	-0.5370
2003-01-01	-3.7366
2003-04-01	-0.3505
2003-07-01	3.3585
2003-10-01	12.1728
2004-01-01	-3.9648
2004-04-01	2.5898
2004-07-01	-0.3708
2004-10-01	5.0391
2005-01-01	6.9457
2005-04-01	6.0367
2005-07-01	5.5366
2005-10-01	6.3025
2006-01-01	12.3439
2006-04-01	9.2500
2006-07-01	2.4274
2006-10-01	10.4424
2007-01-01	3.8641
2007-04-01	11.5398
2007-07-01	7.0345
2007-10-01	2.1851
2008-01-01	-7.5164
2008-04-01	13.6521
2008-07-01	2.1246
2008-10-01	-11.1559
2009-01-01	-0.5386
2009-04-01	-1.6659
2009-07-01	-6.2355
2009-10-01	-1.2543
2010-01-01	1.8007
2010-04-01	-7.7117
2010-07-01	-1.1619
2010-10-01	-6.0826
2011-01-01	-3.6344
2011-04-01	-1.0331
2011-07-01	-3.5177
2011-10-01	-1.7484
2012-01-01	6.5050
2012-04-01	3.0994
2012-07-01	-2.5703
2012-10-01	1.6647
2013-01-01	-1.4572
2013-04-01	-3.7684
2013-07-01	0.7301
2013-10-01	0.6059
2014-01-01	1.5249
2014-04-01	-1.1212
2014-07-01	-1.2446
2014-10-01	-1.5352
2015-01-01	0.7581
2015-04-01	-4.8832