Quarter	Billions of US Dollars
1987-01-01	0.0290
1987-10-01	0.1369
1989-04-01	-0.1625
1989-07-01	0.0294
1990-07-01	0.0920
1991-07-01	0.5750
1992-07-01	-0.0920
1992-10-01	0.0367
1993-01-01	0.2000
1993-07-01	0.0326
1993-10-01	0.0292
1994-01-01	0.2663
1994-04-01	0.0433
1994-07-01	0.1254
1994-10-01	-0.1942
1995-01-01	-0.0325
1995-04-01	0.1155
1995-07-01	0.7475
1995-10-01	0.2612
1996-01-01	0.2820
1996-04-01	0.7998
1996-07-01	0.4543
1996-10-01	0.4061
1997-01-01	1.0685
1997-04-01	0.2230
1997-07-01	0.8887
1997-10-01	-0.5365
1998-01-01	0.2798
1998-04-01	2.1236
1998-07-01	-0.8111
1998-10-01	0.2538
1999-01-01	0.3639
1999-04-01	-0.0166
1999-07-01	0.0851
1999-10-01	0.3807
2000-01-01	-0.8679
2000-04-01	-0.2034
2000-07-01	0.4345
2000-10-01	-0.6617
2001-01-01	1.5167
2001-04-01	0.0069
2001-07-01	0.2202
2001-10-01	1.0806
2002-01-01	-0.2111
2002-04-01	0.2009
2002-07-01	-0.5218
2002-10-01	0.0048
2003-01-01	1.3682
2003-04-01	2.1157
2003-07-01	1.7936
2003-10-01	5.5387
2004-01-01	0.6806
2004-04-01	0.0401
2004-07-01	0.3432
2004-10-01	1.0240
2005-01-01	-0.0017
2005-04-01	-0.9951
2005-07-01	0.3396
2005-10-01	0.2858
2006-01-01	0.3158
2006-04-01	0.0020
2006-07-01	-0.0939
2006-10-01	1.8143
2007-01-01	1.1308
2007-04-01	1.7820
2007-07-01	-0.4205
2007-10-01	3.4577
2008-01-01	-2.5394
2008-04-01	1.0526
2008-07-01	-0.2250
2008-10-01	-0.0907
2009-01-01	-0.4978
2009-04-01	-0.6295
2009-07-01	0.6611
2009-10-01	-0.2525
2010-01-01	1.0557
2010-04-01	-1.1005
2010-07-01	5.2383
2010-10-01	1.5125
2011-01-01	2.4882
2011-04-01	4.0297
2011-07-01	0.9040
2011-10-01	-0.8543
2012-01-01	-0.0889
2012-04-01	8.7099
2012-07-01	3.2444
2012-10-01	3.6483
2013-01-01	0.0442
2013-04-01	9.9455
2013-07-01	-0.7677
2013-10-01	9.8005
2014-01-01	3.5569
2014-04-01	13.2596
2014-07-01	7.4089
2014-10-01	9.8273
2015-01-01	9.6422
2015-04-01	24.6796