Quarter	Billions of US Dollars
1993-07-01	5.72048
1993-10-01	0.19208
1994-01-01	1.04663
1994-04-01	-0.98173
1994-07-01	0.13975
1994-10-01	-1.03549
1995-01-01	-4.35382
1995-04-01	-0.71373
1995-07-01	1.34717
1995-10-01	0.40336
1996-01-01	0.94050
1996-04-01	1.60136
1996-07-01	-1.69933
1996-10-01	-0.02988
1997-01-01	-0.48315
1997-04-01	-0.58434
1997-07-01	1.67701
1997-10-01	-0.46676
1998-01-01	2.84241
1998-04-01	0.22255
1998-07-01	-2.97933
1998-10-01	-1.09518
1999-01-01	-1.78390
1999-04-01	0.81481
1999-07-01	0.05071
1999-10-01	0.75942
2000-01-01	0.21563
2000-04-01	0.18830
2000-07-01	-0.38205
2000-10-01	-1.01754
2001-01-01	0.13479
2001-04-01	-0.24806
2001-07-01	-1.07265
2001-10-01	0.83357
2002-01-01	-0.44971
2002-04-01	-0.50311
2002-07-01	-0.59129
2002-10-01	0.19636
2003-01-01	1.81629
2003-04-01	0.32272
2003-07-01	0.59519
2003-10-01	-1.57773
2004-01-01	-0.78067
2004-04-01	-0.75854
2004-07-01	-0.05525
2004-10-01	0.07851
2005-01-01	0.12537
2005-04-01	-0.03897
2005-07-01	-0.01422
2005-10-01	-0.02684
2006-01-01	0.14341
2006-04-01	0.25644
2006-07-01	-0.04696
2006-10-01	-0.03672
2007-01-01	-1.32442
2007-04-01	0.46278
2007-07-01	-0.75803
2007-10-01	0.81912
2008-01-01	-0.14476
2008-04-01	0.55190
2008-07-01	0.23681
2008-10-01	-0.87052
2009-01-01	-0.02632
2009-04-01	-0.42236
2009-07-01	0.43130
2009-10-01	-0.16460
2010-01-01	-0.01217
2010-04-01	-0.02280
2010-07-01	0.39748
2010-10-01	0.17528
2011-01-01	0.22402
2011-04-01	-0.18206
2011-07-01	-0.64674
2011-10-01	-0.07447
2012-01-01	0.34627
2012-04-01	0.07667
2012-07-01	0.24785
2012-10-01	0.76148
2013-01-01	0.23543
2013-04-01	-0.49909
2013-07-01	-0.77477
2013-10-01	-0.39886
2014-01-01	-0.41545
2014-04-01	-0.28919
2014-07-01	0.16567
2014-10-01	-0.13841
2015-01-01	-0.09544
2015-04-01	0.05117