Quarter	Billions of US Dollars
1993-07-01	3.08790
1993-10-01	-0.75853
1994-01-01	0.28769
1994-04-01	-1.60006
1994-07-01	0.90728
1994-10-01	2.54661
1995-01-01	0.81922
1995-04-01	-0.46713
1995-07-01	1.33775
1995-10-01	-1.11958
1996-01-01	-1.42388
1996-04-01	0.95280
1996-07-01	0.58283
1996-10-01	0.26043
1997-01-01	1.15079
1997-04-01	1.29757
1997-07-01	-0.93154
1997-10-01	-0.88769
1998-01-01	-1.00414
1998-04-01	-0.27586
1998-07-01	0.10566
1998-10-01	0.32149
1999-01-01	0.12351
1999-04-01	-0.83517
1999-07-01	-0.89897
1999-10-01	-1.51611
2000-01-01	-0.28408
2000-04-01	-1.04086
2000-07-01	0.44406
2000-10-01	0.20925
2001-01-01	0.00674
2001-04-01	-0.91224
2001-07-01	0.54105
2001-10-01	-0.93599
2002-01-01	0.53464
2002-04-01	-0.91067
2002-07-01	-0.00016
2002-10-01	0.97469
2003-01-01	-0.45939
2003-04-01	-0.72558
2003-07-01	0.00135
2003-10-01	0.82315
2004-01-01	-0.14509
2004-04-01	-1.13006
2004-07-01	1.63822
2004-10-01	-0.25346
2005-01-01	0.77866
2005-04-01	-0.53215
2005-07-01	-1.51796
2005-10-01	1.76820
2006-01-01	-2.07803
2006-04-01	0.46608
2006-07-01	-0.31335
2006-10-01	1.04516
2007-01-01	-0.14673
2007-04-01	-0.05490
2007-07-01	1.97653
2007-10-01	-0.42534
2008-01-01	-1.57434
2008-04-01	-0.67728
2008-07-01	-1.27719
2008-10-01	2.76276
2009-01-01	-0.92367
2009-04-01	1.19264
2009-07-01	1.41953
2009-10-01	-2.26562
2010-01-01	-0.65441
2010-04-01	0.40506
2010-07-01	0.01412
2010-10-01	-0.43212
2011-01-01	-0.31164
2011-04-01	3.09938
2011-07-01	0.67223
2011-10-01	-0.22612
2012-01-01	-1.36718
2012-04-01	-2.59515
2012-07-01	-1.00861
2012-10-01	3.25222
2013-01-01	-1.18568
2013-04-01	-2.60243
2013-07-01	1.87861
2013-10-01	0.92465
2014-01-01	-2.10918
2014-04-01	-2.05959
2014-07-01	-1.55934
2014-10-01	0.16984
2015-01-01	0.77774
2015-04-01	-1.60423