Quarter	Billions of US Dollars
1987-01-01	0.6701
1987-04-01	0.0343
1987-07-01	-0.0066
1988-04-01	-0.0141
1988-10-01	-0.0535
1989-01-01	-0.0506
1989-07-01	-0.0361
1990-04-01	0.2401
1990-07-01	0.0353
1991-04-01	0.0571
1991-07-01	0.0546
1991-10-01	0.1221
1992-01-01	0.2006
1992-04-01	-0.1030
1992-07-01	0.0006
1992-10-01	0.0006
1993-01-01	0.2506
1993-04-01	0.3289
1993-07-01	0.0006
1993-10-01	0.1830
1994-01-01	-0.0165
1994-04-01	0.0780
1994-07-01	0.3884
1994-10-01	0.8955
1995-01-01	0.7818
1995-04-01	1.1305
1995-07-01	1.6244
1995-10-01	2.5391
1996-01-01	0.8133
1996-04-01	1.4140
1996-07-01	1.0719
1996-10-01	0.7554
1997-01-01	-0.0434
1997-04-01	0.9815
1997-07-01	0.7306
1997-10-01	0.1793
1998-01-01	1.4285
1998-04-01	-0.0920
1998-07-01	0.4549
1998-10-01	0.6127
1999-01-01	2.4086
1999-04-01	1.1212
1999-07-01	4.6264
1999-10-01	-4.2764
2000-01-01	11.0201
2000-04-01	4.4659
2000-07-01	3.5217
2000-10-01	1.9425
2001-01-01	0.1304
2001-04-01	-0.1501
2001-07-01	4.4280
2001-10-01	11.1131
2002-01-01	7.8957
2002-04-01	3.3434
2002-07-01	9.2999
2002-10-01	0.4860
2003-01-01	14.9245
2003-04-01	5.2540
2003-07-01	18.1560
2003-10-01	5.8416
2004-01-01	11.3026
2004-04-01	14.9183
2004-07-01	17.6783
2004-10-01	8.1751
2005-01-01	21.4850
2005-04-01	12.9263
2005-07-01	6.1562
2005-10-01	10.9001
2006-01-01	21.9852
2006-04-01	13.9083
2006-07-01	3.1849
2006-10-01	14.1657
2007-01-01	17.5321
2007-04-01	30.7122
2007-07-01	9.7129
2007-10-01	9.4105
2008-01-01	39.1891
2008-04-01	5.5278
2008-07-01	-7.0198
2008-10-01	30.0450
2009-01-01	16.3407
2009-04-01	10.7347
2009-07-01	-3.1050
2009-10-01	-3.2910
2010-01-01	2.3543
2010-04-01	-8.7091
2010-07-01	-6.4041
2010-10-01	6.6472
2011-01-01	-2.2802
2011-04-01	13.1889
2011-07-01	32.2220
2011-10-01	21.3627
2012-01-01	2.3977
2012-04-01	-6.9897
2012-07-01	-19.4227
2012-10-01	9.1760
2013-01-01	-5.2569
2013-04-01	-9.7392
2013-07-01	2.5028
2013-10-01	-0.9208
2014-01-01	-17.5427
2014-04-01	8.7364
2014-07-01	6.3765
2014-10-01	-1.4580
2015-01-01	11.3706
2015-04-01	-5.8206