Quarter	Billions of US Dollars
1987-01-01	0.2787
1987-04-01	-0.0716
1987-07-01	0.0922
1987-10-01	-0.0204
1988-01-01	-0.2793
1988-04-01	0.5586
1988-07-01	0.2841
1988-10-01	0.0171
1989-01-01	0.4104
1989-04-01	0.0449
1989-07-01	-0.1254
1989-10-01	0.1513
1990-01-01	-0.2608
1990-04-01	-0.1496
1990-07-01	-0.0676
1990-10-01	-0.1111
1991-01-01	-0.5578
1991-04-01	-0.2416
1991-07-01	-0.2848
1991-10-01	-0.3939
1992-01-01	-0.5703
1992-04-01	-0.2771
1992-07-01	-0.0754
1992-10-01	-0.4250
1993-01-01	-0.4752
1993-04-01	-0.6421
1993-07-01	-0.1114
1993-10-01	-0.1446
1994-01-01	-0.2561
1994-04-01	-0.2449
1994-07-01	-0.0709
1994-10-01	-0.3323
1995-01-01	-0.0574
1995-04-01	-0.0180
1995-07-01	-0.0258
1995-10-01	-0.0462
1996-01-01	0.3072
1996-04-01	-0.1065
1996-07-01	0.1122
1996-10-01	0.7677
1997-01-01	0.1746
1997-04-01	0.1542
1997-07-01	2.2567
1997-10-01	0.7642
1998-01-01	0.5997
1998-04-01	2.3150
1998-07-01	0.3000
1998-10-01	-0.3195
1999-01-01	0.0682
1999-04-01	1.2245
1999-07-01	0.3723
1999-10-01	-0.4648
2000-01-01	1.2739
2000-04-01	1.2554
2000-07-01	0.4585
2000-10-01	0.7912
2001-01-01	1.9490
2001-04-01	0.2083
2001-07-01	0.9583
2001-10-01	0.7035
2002-01-01	0.7853
2002-04-01	0.8690
2002-07-01	-0.2748
2002-10-01	0.5382
2003-01-01	2.2832
2003-04-01	1.4115
2003-07-01	2.5431
2003-10-01	1.9560
2004-01-01	0.9269
2004-04-01	1.0221
2004-07-01	0.8530
2004-10-01	4.4224
2005-01-01	1.8473
2005-04-01	1.2723
2005-07-01	-0.1699
2005-10-01	3.6413
2006-01-01	3.4280
2006-04-01	7.3902
2006-07-01	3.9384
2006-10-01	6.3465
2007-01-01	5.8237
2007-04-01	-0.5919
2007-07-01	2.3550
2007-10-01	9.9046
2008-01-01	12.3760
2008-04-01	9.2011
2008-07-01	0.7385
2008-10-01	3.2668
2009-01-01	1.6538
2009-04-01	0.3520
2009-07-01	3.5738
2009-10-01	-1.9685
2010-01-01	10.0982
2010-04-01	5.2520
2010-07-01	5.1195
2010-10-01	-2.5296
2011-01-01	18.0426
2011-04-01	2.7870
2011-07-01	2.5884
2011-10-01	13.9666
2012-01-01	20.5211
2012-04-01	9.7160
2012-07-01	4.0149
2012-10-01	-3.4649
2013-01-01	2.3989
2013-04-01	8.2765
2013-07-01	-0.0361
2013-10-01	6.5408
2014-01-01	1.8322
2014-04-01	-5.6707
2014-07-01	-0.8150
2014-10-01	3.1569
2015-01-01	1.1373
2015-04-01	-7.6044