Quarter	Billions of US Dollars
1993-07-01	0.8258
1993-10-01	-1.4730
1994-01-01	-2.7784
1994-04-01	-0.9716
1994-07-01	-0.8333
1994-10-01	1.1495
1995-01-01	0.2886
1995-04-01	-1.0458
1995-07-01	2.4963
1995-10-01	-0.0029
1996-01-01	0.4586
1996-04-01	0.9890
1996-07-01	-0.0214
1996-10-01	0.2693
1997-01-01	0.9912
1997-04-01	0.7838
1997-07-01	2.6489
1997-10-01	-1.4056
1998-01-01	3.9782
1998-04-01	3.3438
1998-07-01	1.9555
1998-10-01	-1.2022
1999-01-01	3.7201
1999-04-01	3.2307
1999-07-01	-0.6129
1999-10-01	-0.5107
2000-01-01	-0.9710
2000-04-01	0.7726
2000-07-01	3.6788
2000-10-01	-1.5743
2001-01-01	0.0639
2001-04-01	-1.2215
2001-07-01	-0.1570
2001-10-01	-1.4652
2002-01-01	1.9643
2002-04-01	3.6940
2002-07-01	0.2924
2002-10-01	0.5567
2003-01-01	0.2271
2003-04-01	3.0737
2003-07-01	0.8505
2003-10-01	5.0097
2004-01-01	4.1299
2004-04-01	1.0131
2004-07-01	2.6832
2004-10-01	0.3282
2005-01-01	6.7716
2005-04-01	3.1531
2005-07-01	0.7396
2005-10-01	8.1347
2006-01-01	4.1066
2006-04-01	7.4296
2006-07-01	3.3810
2006-10-01	5.6938
2007-01-01	9.5123
2007-04-01	9.6278
2007-07-01	-0.8509
2007-10-01	3.6511
2008-01-01	1.5124
2008-04-01	8.6876
2008-07-01	4.9478
2008-10-01	3.7493
2009-01-01	15.0707
2009-04-01	10.5521
2009-07-01	-1.3709
2009-10-01	3.1597
2010-01-01	4.3312
2010-04-01	0.4317
2010-07-01	4.1737
2010-10-01	-3.0064
2011-01-01	3.6725
2011-04-01	-4.3868
2011-07-01	-5.2318
2011-10-01	-7.0996
2012-01-01	-5.4697
2012-04-01	-9.4059
2012-07-01	1.2574
2012-10-01	-2.7986
2013-01-01	-6.5852
2013-04-01	-1.9818
2013-07-01	-8.4053
2013-10-01	-9.5395
2014-01-01	-1.2337
2014-04-01	-1.9419
2014-07-01	-1.0077
2014-10-01	-8.4194
2015-01-01	-13.6482
2015-04-01	-7.3448