Quarter	Billions of US Dollars
1987-07-01	-0.0079
1988-01-01	0.0590
1988-04-01	0.0715
1989-01-01	0.0760
1989-04-01	-0.0724
1989-07-01	-0.1000
1989-10-01	-0.0650
1990-07-01	0.1539
1991-07-01	-0.1000
1991-10-01	-0.0921
1992-01-01	0.1500
1993-01-01	0.1097
1993-04-01	-0.1139
1993-07-01	0.2407
1993-10-01	0.0445
1994-01-01	0.0369
1994-04-01	0.0746
1994-07-01	0.0934
1994-10-01	0.2067
1995-01-01	0.1217
1995-04-01	0.0750
1995-07-01	-0.0849
1995-10-01	0.0123
1996-01-01	-0.0519
1996-04-01	0.1812
1996-07-01	0.0013
1996-10-01	0.1093
1997-01-01	0.0434
1997-04-01	0.0446
1997-07-01	-0.0665
1997-10-01	0.0721
1998-01-01	0.1791
1998-04-01	0.0384
1998-07-01	-0.0866
1998-10-01	0.1871
1999-01-01	0.1605
1999-04-01	-0.0571
1999-07-01	0.0569
1999-10-01	0.3689
2000-01-01	0.0531
2000-04-01	0.2230
2000-07-01	0.0626
2000-10-01	-0.0195
2001-01-01	0.3734
2001-04-01	0.0609
2001-07-01	0.3406
2001-10-01	0.3271
2002-01-01	0.4438
2002-04-01	0.1484
2002-07-01	0.6736
2002-10-01	0.5264
2003-01-01	0.1791
2003-04-01	0.5027
2003-07-01	0.1180
2003-10-01	0.0720
2004-01-01	0.3359
2004-04-01	-0.2925
2004-07-01	0.1679
2004-10-01	0.0459
2005-01-01	0.4135
2005-04-01	-0.1123
2005-07-01	-0.0814
2005-10-01	0.3393
2006-01-01	-0.4315
2006-04-01	2.0514
2006-07-01	-0.1124
2006-10-01	1.7569
2007-01-01	4.5543
2007-04-01	13.7757
2007-07-01	-1.7538
2007-10-01	1.7151
2008-01-01	2.6060
2008-04-01	0.2069
2008-07-01	0.4239
2008-10-01	-0.1676
2009-01-01	1.8721
2009-04-01	1.3697
2009-07-01	0.8305
2009-10-01	1.4823
2010-01-01	3.1139
2010-04-01	2.7343
2010-07-01	2.8478
2010-10-01	0.3952
2011-01-01	1.2823
2011-04-01	-1.0838
2011-07-01	1.0877
2011-10-01	-0.2969
2012-01-01	1.2588
2012-04-01	0.9518
2012-07-01	2.0443
2012-10-01	1.2619
2013-01-01	1.1179
2013-04-01	-1.1548
2013-07-01	-1.0347
2013-10-01	-0.5782
2014-01-01	0.3915
2014-04-01	-0.8755
2014-07-01	-0.4738
2014-10-01	-0.6512
2015-01-01	0.0705
2015-04-01	0.5702