Quarter	Billions of US Dollars
1987-01-01	0.2014
1987-04-01	0.5931
1987-07-01	0.4402
1987-10-01	0.5479
1988-01-01	0.3045
1988-04-01	0.9698
1988-07-01	0.6488
1988-10-01	1.0582
1989-01-01	1.5864
1989-04-01	0.6569
1989-07-01	1.0061
1989-10-01	0.1092
1990-01-01	0.2521
1990-04-01	-0.1061
1990-07-01	0.3053
1990-10-01	0.0728
1991-01-01	-0.2530
1991-04-01	-0.5970
1991-07-01	0.1713
1991-10-01	0.0594
1992-01-01	-0.3942
1992-04-01	-0.7199
1992-07-01	-0.4215
1992-10-01	0.1816
1993-01-01	-0.3937
1993-04-01	-0.2921
1993-07-01	5.5081
1993-10-01	-0.3209
1994-01-01	0.9691
1994-04-01	1.1342
1994-07-01	-0.6386
1994-10-01	-0.1305
1995-01-01	0.8017
1995-04-01	-0.1215
1995-07-01	1.0181
1995-10-01	1.6726
1996-01-01	2.4575
1996-04-01	2.6904
1996-07-01	1.7065
1996-10-01	2.0645
1997-01-01	1.3239
1997-04-01	2.2455
1997-07-01	-0.2696
1997-10-01	-2.2706
1998-01-01	2.5513
1998-04-01	-1.5218
1998-07-01	1.8476
1998-10-01	-0.9259
1999-01-01	3.5345
1999-04-01	-0.5191
1999-07-01	3.3738
1999-10-01	2.5858
2000-01-01	4.9689
2000-04-01	3.9751
2000-07-01	1.5601
2000-10-01	3.5977
2001-01-01	-2.5035
2001-04-01	1.6123
2001-07-01	1.6859
2001-10-01	-1.1018
2002-01-01	0.3874
2002-04-01	1.7846
2002-07-01	3.2815
2002-10-01	2.1541
2003-01-01	2.7714
2003-04-01	9.5641
2003-07-01	6.1729
2003-10-01	7.5714
2004-01-01	7.4416
2004-04-01	5.5179
2004-07-01	12.9874
2004-10-01	5.4256
2005-01-01	6.4079
2005-04-01	15.0893
2005-07-01	-3.3590
2005-10-01	11.0504
2006-01-01	19.8745
2006-04-01	10.3878
2006-07-01	7.4209
2006-10-01	12.5328
2007-01-01	0.4270
2007-04-01	9.8828
2007-07-01	10.4014
2007-10-01	-1.3888
2008-01-01	41.9624
2008-04-01	-0.9361
2008-07-01	-10.1991
2008-10-01	-17.6922
2009-01-01	-8.1368
2009-04-01	12.3813
2009-07-01	10.4235
2009-10-01	32.7633
2010-01-01	11.8234
2010-04-01	-0.4419
2010-07-01	6.0168
2010-10-01	7.3378
2011-01-01	-3.6241
2011-04-01	5.2463
2011-07-01	-4.8373
2011-10-01	-10.9990
2012-01-01	9.0039
2012-04-01	0.6304
2012-07-01	22.9181
2012-10-01	-8.0128
2013-01-01	5.9938
2013-04-01	-3.1609
2013-07-01	5.6209
2013-10-01	17.4696
2014-01-01	2.4750
2014-04-01	7.5983
2014-07-01	-2.0902
2014-10-01	2.7641
2015-01-01	4.2357
2015-04-01	0.8020