Quarter	Billions of US Dollars
1975-01-01	0.06000
1975-04-01	0.04000
1983-01-01	-0.06000
1983-04-01	-0.04000
1996-01-01	0.05000
1996-04-01	0.72151
1996-10-01	0.27166
1997-01-01	0.08590
1997-04-01	0.55164
1997-07-01	0.00324
1997-10-01	0.00329
1998-01-01	0.00334
1998-04-01	0.00340
1998-07-01	0.00345
1998-10-01	0.00351
1999-01-01	0.00356
1999-04-01	-0.65134
1999-07-01	0.00368
1999-10-01	0.00374
2000-01-01	-0.08381
2000-04-01	0.00386
2000-07-01	0.00392
2000-10-01	0.26349
2001-01-01	0.09636
2001-04-01	0.65594
2001-07-01	0.00419
2001-10-01	-0.12388
2002-01-01	0.00432
2002-04-01	0.34492
2002-07-01	0.00446
2002-10-01	0.44443
2003-01-01	0.00461
2003-04-01	0.00468
2003-07-01	0.81833
2003-10-01	-0.17346
2004-01-01	0.00491
2004-04-01	-0.17562
2004-07-01	0.00507
2004-10-01	-0.04057
2005-01-01	0.00524
2005-04-01	0.57326
2005-07-01	0.00541
2005-10-01	0.25577
2006-01-01	0.00559
2006-04-01	-0.04004
2006-07-01	0.00577
2006-10-01	0.07709
2007-01-01	0.00596
2007-04-01	-0.41967
2007-10-01	-0.21962
2008-04-01	0.22929
2008-10-01	-0.50000
2009-10-01	0.04804
2010-01-01	1.44607
2010-04-01	0.04371
2010-07-01	-0.92592
2010-10-01	0.04401
2011-01-01	0.03385
2011-04-01	2.20400
2011-07-01	0.03844
2011-10-01	-0.21149
2012-01-01	3.43373
2012-04-01	-0.89640
2012-07-01	0.94340
2012-10-01	1.94017
2013-01-01	1.50101
2013-04-01	-0.00949
2013-07-01	1.98287
2013-10-01	1.14343
2014-01-01	1.90538
2014-04-01	1.67889
2014-07-01	0.00001
2014-10-01	1.85347
2015-01-01	-1.18561
2015-04-01	-0.55618