Quarter	Billions of US Dollars
1993-07-01	0.21554
1993-10-01	-0.05169
1994-01-01	0.04632
1994-04-01	-0.03043
1994-07-01	-0.00074
1995-01-01	-0.00449
1995-07-01	-0.03036
1995-10-01	-0.15000
1996-01-01	0.05000
1996-04-01	0.13391
1996-07-01	0.12515
1996-10-01	0.19143
1997-01-01	0.06982
1997-04-01	-0.07229
1997-07-01	-0.08339
1997-10-01	-0.07814
1998-01-01	-0.08422
1998-04-01	0.18269
1998-07-01	0.03265
1998-10-01	-0.02000
1999-01-01	-0.09362
1999-04-01	-0.05545
1999-07-01	0.20316
1999-10-01	-0.13032
2000-01-01	-0.11282
2000-04-01	0.00605
2000-07-01	-0.04499
2000-10-01	0.03206
2001-01-01	0.00921
2001-04-01	0.14424
2001-07-01	-0.24193
2001-10-01	-0.03715
2002-01-01	0.07772
2002-04-01	0.03092
2002-07-01	0.01121
2002-10-01	0.01934
2003-01-01	-0.00428
2003-04-01	0.14742
2003-07-01	0.01457
2003-10-01	0.14417
2004-01-01	0.18491
2004-04-01	-0.12301
2004-07-01	0.10039
2004-10-01	0.40378
2005-01-01	0.14255
2005-04-01	-0.49138
2005-07-01	0.84751
2005-10-01	0.00225
2006-01-01	-0.98338
2006-04-01	0.31362
2006-07-01	-0.02120
2006-10-01	-0.12105
2007-01-01	0.01674
2007-04-01	0.34762
2007-07-01	0.08425
2007-10-01	-0.49904
2008-01-01	0.14440
2008-04-01	0.64074
2008-07-01	-0.37504
2008-10-01	-0.41823
2009-01-01	-0.03485
2009-04-01	-0.00968
2009-07-01	0.39891
2009-10-01	-0.16363
2010-01-01	0.38835
2010-04-01	-0.21964
2010-07-01	0.32052
2010-10-01	-0.09106
2011-01-01	1.49417
2011-04-01	1.98229
2011-07-01	3.88859
2011-10-01	1.63977
2012-01-01	-0.15041
2012-04-01	-0.89142
2012-07-01	-2.33722
2012-10-01	-1.14536
2013-01-01	1.49921
2013-04-01	3.51932
2013-07-01	4.67517
2013-10-01	3.16507
2014-01-01	-1.10714
2014-04-01	0.79156
2014-07-01	1.14736
2014-10-01	-1.63968
2015-01-01	-2.95966
2015-04-01	0.99144