Quarter	Billions of US Dollars
1993-07-01	0.11680
1993-10-01	0.73291
1994-01-01	1.36772
1994-04-01	-0.46950
1994-07-01	-0.63448
1994-10-01	-0.07311
1995-01-01	0.09305
1995-07-01	-0.00738
1996-01-01	-0.02943
1996-04-01	0.11726
1996-07-01	0.01460
1996-10-01	-0.12789
1997-01-01	-0.11814
1997-04-01	0.34268
1997-07-01	0.17403
1997-10-01	-0.17744
1998-01-01	-0.05943
1998-04-01	0.56935
1998-07-01	-0.02014
1998-10-01	0.00648
1999-01-01	-0.70891
1999-04-01	-0.10184
1999-07-01	-0.15545
2000-01-01	0.70250
2000-04-01	-0.01689
2000-07-01	-0.14956
2000-10-01	-0.00655
2001-01-01	0.02340
2001-04-01	0.02854
2001-07-01	0.03816
2001-10-01	-0.01343
2002-01-01	0.21571
2002-04-01	-0.18337
2002-07-01	-0.38255
2002-10-01	0.08624
2003-01-01	0.15367
2003-04-01	-0.55849
2003-07-01	0.03141
2003-10-01	1.30671
2004-01-01	2.01342
2004-04-01	1.90179
2004-07-01	2.26564
2004-10-01	1.86356
2005-01-01	3.36521
2005-04-01	1.75574
2005-07-01	2.30202
2005-10-01	1.93491
2006-01-01	1.37190
2006-04-01	0.18942
2006-07-01	-0.25211
2006-10-01	2.23349
2007-01-01	2.01864
2007-04-01	0.86150
2007-07-01	0.55372
2007-10-01	-0.04127
2008-01-01	-1.95915
2008-04-01	2.61104
2008-07-01	-1.85212
2008-10-01	-3.12268
2009-01-01	-0.82324
2009-04-01	1.07110
2009-07-01	0.10021
2009-10-01	-1.08303
2010-01-01	-1.65799
2010-04-01	1.76247
2010-07-01	0.18836
2010-10-01	1.62131
2011-01-01	2.58261
2011-04-01	0.80019
2011-07-01	-0.19758
2011-10-01	1.47913
2012-01-01	2.44648
2012-04-01	0.07389
2012-07-01	-0.21126
2012-10-01	-0.33842
2013-01-01	0.27414
2013-04-01	-0.40117
2013-07-01	1.65619
2013-10-01	0.01334
2014-01-01	-1.97752
2014-04-01	-1.00136
2014-07-01	-5.72452
2014-10-01	0.05324
2015-01-01	-4.83438
2015-04-01	0.15085