Quarter	Billions of US Dollars
1987-10-01	0.0295
1988-01-01	0.1500
1988-07-01	0.0206
1989-04-01	0.0936
1989-07-01	0.2400
1990-04-01	0.0750
1990-07-01	-0.0092
1990-10-01	0.0546
1991-04-01	0.0063
1992-07-01	0.0095
1992-10-01	-0.0295
1993-01-01	-0.1500
1993-07-01	-0.0549
1993-10-01	0.0240
1994-01-01	0.0220
1994-04-01	0.0040
1994-07-01	-0.1051
1994-10-01	0.0517
1995-01-01	-0.0107
1995-04-01	0.0117
1995-07-01	0.0346
1995-10-01	-0.0423
1996-01-01	0.0098
1996-04-01	0.3979
1996-07-01	0.0015
1996-10-01	-0.1712
1997-01-01	-0.0128
1997-04-01	0.6244
1997-07-01	0.9410
1997-10-01	0.0591
1998-01-01	0.0040
1998-04-01	0.0288
1998-07-01	0.0630
1998-10-01	-0.1455
1999-01-01	-0.0073
1999-04-01	0.3372
1999-07-01	-0.0162
1999-10-01	0.3045
2000-01-01	0.0148
2000-04-01	1.2916
2000-07-01	4.2148
2000-10-01	-2.9246
2001-01-01	3.9145
2001-04-01	-0.9847
2001-07-01	-1.0191
2001-10-01	0.0970
2002-01-01	0.1331
2002-04-01	0.4555
2002-07-01	-0.8454
2002-10-01	0.5966
2003-01-01	0.6649
2003-04-01	-0.0880
2003-07-01	0.1084
2003-10-01	-0.5774
2004-01-01	-1.3871
2004-04-01	-0.6868
2004-07-01	2.1141
2004-10-01	-0.3823
2005-01-01	-0.1012
2005-04-01	0.6011
2005-07-01	-0.7211
2005-10-01	-0.3313
2006-01-01	0.6863
2006-04-01	-0.0701
2006-07-01	-0.0519
2006-10-01	2.3063
2007-01-01	0.1252
2007-04-01	-0.1734
2007-07-01	-0.2669
2007-10-01	-1.2071
2008-01-01	-0.3229
2008-04-01	1.8258
2008-07-01	0.0718
2008-10-01	23.0652
2009-01-01	7.0308
2009-04-01	3.5786
2009-07-01	-0.3186
2009-10-01	5.1266
2010-01-01	-0.3170
2010-04-01	7.3309
2010-07-01	8.1981
2010-10-01	-0.3434
2011-01-01	0.1604
2011-04-01	-1.1642
2011-07-01	-0.1460
2011-10-01	-0.0275
2012-01-01	-0.2500
2012-04-01	4.2678
2012-07-01	5.7377
2013-01-01	0.5764
2013-04-01	0.6442
2013-07-01	0.9224
2013-10-01	0.2540
2014-01-01	-0.0986
2014-04-01	0.1624
2014-07-01	-0.1325
2014-10-01	-0.0749
2015-01-01	0.4235
2015-04-01	-0.0750