Quarter	Billions of US Dollars
1987-04-01	-0.0750
1987-10-01	-0.1000
1988-04-01	0.5520
1988-07-01	0.7123
1988-10-01	0.0806
1989-01-01	0.3981
1989-04-01	-0.3563
1989-07-01	0.4154
1989-10-01	0.4532
1990-01-01	0.7499
1990-04-01	0.6116
1990-07-01	1.2373
1990-10-01	-0.3199
1991-01-01	-0.0142
1991-04-01	0.5596
1991-07-01	0.4440
1991-10-01	0.3342
1992-01-01	0.3392
1992-04-01	0.5363
1992-07-01	0.2717
1992-10-01	-0.0116
1993-01-01	0.2732
1993-04-01	3.1796
1993-07-01	5.7259
1993-10-01	2.4275
1994-01-01	2.7413
1994-04-01	1.5714
1994-07-01	1.2379
1994-10-01	2.0162
1995-01-01	2.1813
1995-04-01	0.4943
1995-07-01	2.1435
1995-10-01	1.3080
1996-01-01	4.9534
1996-04-01	2.9379
1996-07-01	1.7967
1996-10-01	5.0772
1997-01-01	0.1262
1997-04-01	0.1890
1997-07-01	2.3088
1997-10-01	0.7866
1998-01-01	6.3463
1998-04-01	4.0819
1998-07-01	3.6321
1998-10-01	-0.8359
1999-01-01	8.0984
1999-04-01	6.1700
1999-07-01	5.4316
1999-10-01	3.2331
2000-01-01	6.4433
2000-04-01	6.5686
2000-07-01	3.1508
2000-10-01	4.0487
2001-01-01	7.4625
2001-04-01	0.1479
2001-07-01	0.0703
2001-10-01	4.8698
2002-01-01	1.4961
2002-04-01	9.2668
2002-07-01	-1.1084
2002-10-01	3.6999
2003-01-01	12.4550
2003-04-01	6.8293
2003-07-01	2.7099
2003-10-01	12.9660
2004-01-01	-3.8253
2004-04-01	-5.5517
2004-07-01	-5.1551
2004-10-01	5.0250
2005-01-01	8.5580
2005-04-01	17.1652
2005-07-01	2.8800
2005-10-01	32.8956
2006-01-01	40.2502
2006-04-01	20.9328
2006-07-01	18.3900
2006-10-01	3.1513
2007-01-01	36.0842
2007-04-01	14.4273
2007-07-01	20.1444
2007-10-01	-1.1342
2008-01-01	-2.6867
2008-04-01	28.5121
2008-07-01	27.4070
2008-10-01	-22.8608
2009-01-01	5.9787
2009-04-01	-1.9575
2009-07-01	-7.2771
2009-10-01	-5.9215
2010-01-01	-2.8290
2010-04-01	-20.9755
2010-07-01	23.5936
2010-10-01	-13.7240
2011-01-01	-4.0769
2011-04-01	-5.0310
2011-07-01	-21.9978
2011-10-01	-15.7747
2012-01-01	27.1861
2012-04-01	-23.2958
2012-07-01	-8.9148
2012-10-01	-15.9704
2013-01-01	-11.5508
2013-04-01	-14.9941
2013-07-01	-25.9950
2013-10-01	2.1272
2014-01-01	-5.0397
2014-04-01	5.5836
2014-07-01	-1.3759
2014-10-01	-9.5491
2015-01-01	8.3738
2015-04-01	-9.0021