Quarter	Billions of US Dollars
1993-07-01	2.0045
1993-10-01	0.1009
1994-01-01	0.7478
1994-04-01	-0.0499
1994-07-01	-0.1261
1994-10-01	-1.3769
1995-01-01	-0.1744
1995-04-01	0.4075
1995-07-01	0.1344
1995-10-01	0.0912
1996-01-01	1.1828
1996-04-01	0.7034
1996-07-01	-0.3094
1996-10-01	0.0237
1997-01-01	0.4651
1997-04-01	1.7858
1997-07-01	3.1562
1997-10-01	0.7330
1998-01-01	0.0296
1998-04-01	0.9730
1998-07-01	2.3507
1998-10-01	3.5818
1999-01-01	1.9022
1999-04-01	2.6575
1999-07-01	3.9326
1999-10-01	0.4838
2000-01-01	-1.4619
2000-04-01	4.5583
2000-07-01	2.8913
2000-10-01	1.9169
2001-01-01	5.7636
2001-04-01	-1.9455
2001-07-01	0.2078
2001-10-01	0.8431
2002-01-01	-3.4786
2002-04-01	2.7514
2002-07-01	-0.3920
2002-10-01	2.5789
2003-01-01	2.1021
2003-04-01	-1.7214
2003-07-01	-2.4532
2003-10-01	2.9894
2004-01-01	-1.6512
2004-04-01	6.0784
2004-07-01	-4.4884
2004-10-01	-2.0271
2005-01-01	4.2760
2005-04-01	-0.7878
2005-07-01	1.1253
2005-10-01	2.6420
2006-01-01	4.8443
2006-04-01	8.5904
2006-07-01	-0.9254
2006-10-01	-1.0569
2007-01-01	6.5998
2007-04-01	3.0057
2007-07-01	-4.2383
2007-10-01	-7.5378
2008-01-01	21.7798
2008-04-01	-6.8356
2008-07-01	11.8244
2008-10-01	-2.8198
2009-01-01	2.3171
2009-04-01	-4.5132
2009-07-01	13.2377
2009-10-01	-13.3551
2010-01-01	1.9766
2010-04-01	-14.2399
2010-07-01	19.3606
2010-10-01	0.3435
2011-01-01	0.7894
2011-04-01	4.8363
2011-07-01	5.6300
2011-10-01	2.8075
2012-01-01	15.1015
2012-04-01	-5.2388
2012-07-01	-2.6927
2012-10-01	-1.8487
2013-01-01	-9.0228
2013-04-01	5.6894
2013-07-01	-6.4115
2013-10-01	-17.7518
2014-01-01	-2.8596
2014-04-01	5.6265
2014-07-01	-10.0588
2014-10-01	-6.6871
2015-01-01	3.2456
2015-04-01	-4.8089