Quarter	Billions of US Dollars
1987-01-01	-0.1578
1987-04-01	0.4726
1987-07-01	0.1507
1987-10-01	0.0013
1988-01-01	0.3393
1988-04-01	0.1606
1988-07-01	0.3253
1988-10-01	0.1805
1989-01-01	0.0592
1989-04-01	0.3206
1989-07-01	0.0451
1989-10-01	0.1491
1990-01-01	-0.3014
1990-04-01	-0.0755
1990-07-01	0.2446
1990-10-01	-0.0633
1991-01-01	-0.0551
1991-04-01	-0.2887
1991-07-01	0.6138
1991-10-01	0.3270
1992-01-01	0.2250
1992-04-01	0.3761
1992-07-01	-0.1727
1992-10-01	0.0714
1993-01-01	-0.1999
1993-04-01	-0.7011
1993-07-01	0.1394
1993-10-01	-0.1378
1994-01-01	-0.0934
1994-04-01	-0.3865
1994-07-01	-0.3276
1994-10-01	0.4443
1995-01-01	0.3542
1995-04-01	-0.3086
1995-07-01	0.1195
1995-10-01	0.1101
1996-01-01	0.3954
1996-04-01	-0.2535
1996-07-01	-0.3072
1996-10-01	-0.3750
1997-01-01	1.1872
1997-04-01	0.4813
1997-07-01	0.4805
1997-10-01	0.3025
1998-01-01	0.7401
1998-04-01	3.3733
1998-07-01	1.6029
1998-10-01	0.8296
1999-01-01	5.1707
1999-04-01	15.9731
1999-07-01	9.5733
1999-10-01	7.9212
2000-01-01	3.8172
2000-04-01	4.0009
2000-07-01	6.8637
2000-10-01	9.1699
2001-01-01	6.3481
2001-04-01	13.5776
2001-07-01	5.2568
2001-10-01	15.5101
2002-01-01	4.3501
2002-04-01	-0.3338
2002-07-01	5.6997
2002-10-01	10.9880
2003-01-01	15.8867
2003-04-01	2.1519
2003-07-01	3.6902
2003-10-01	10.2289
2004-01-01	4.9275
2004-04-01	2.6370
2004-07-01	-8.9764
2004-10-01	7.4326
2005-01-01	-3.2346
2005-04-01	18.0678
2005-07-01	0.3119
2005-10-01	15.2527
2006-01-01	1.1710
2006-04-01	6.7185
2006-07-01	8.7799
2006-10-01	11.4870
2007-01-01	8.9251
2007-04-01	12.8737
2007-07-01	2.3393
2007-10-01	-2.9358
2008-01-01	1.0955
2008-04-01	5.6338
2008-07-01	15.1349
2008-10-01	49.3358
2009-01-01	14.4370
2009-04-01	7.5592
2009-07-01	29.8922
2009-10-01	18.3658
2010-01-01	-4.3598
2010-04-01	-2.0003
2010-07-01	-0.3018
2010-10-01	3.7043
2011-01-01	0.2530
2011-04-01	-2.3405
2011-07-01	-6.1550
2011-10-01	8.2560
2012-01-01	-25.8135
2012-04-01	-8.7857
2012-07-01	-6.1436
2012-10-01	-0.9386
2013-01-01	-1.8289
2013-04-01	-3.4644
2013-07-01	6.5501
2013-10-01	-2.2928
2014-01-01	2.6354
2014-04-01	9.7464
2014-07-01	-5.3509
2014-10-01	1.1181
2015-01-01	7.1513
2015-04-01	2.0162