Quarter	Billions of US Dollars
1993-07-01	0.21751
1993-10-01	-0.06882
1994-01-01	0.03354
1994-04-01	0.07183
1994-07-01	-0.06237
1994-10-01	-0.01360
1995-01-01	0.04475
1995-04-01	0.65751
1995-07-01	0.57824
1995-10-01	0.52381
1996-01-01	-0.14350
1996-04-01	0.32735
1996-07-01	1.70626
1996-10-01	1.19018
1997-01-01	-0.38213
1997-04-01	-0.55781
1997-07-01	-0.73531
1997-10-01	-1.77252
1998-01-01	-0.11504
1998-04-01	0.27502
1998-07-01	-0.48580
1998-10-01	0.03248
1999-01-01	0.07778
1999-04-01	-0.27046
1999-07-01	-0.02195
1999-10-01	0.27106
2000-01-01	0.19280
2000-04-01	0.41027
2000-07-01	0.56287
2000-10-01	-0.49461
2001-01-01	-0.72840
2001-04-01	0.09494
2001-07-01	-0.45091
2001-10-01	0.02593
2002-01-01	-0.21267
2002-04-01	0.34539
2002-07-01	-0.02551
2002-10-01	0.08375
2003-01-01	0.08247
2003-04-01	-0.25752
2003-07-01	0.52916
2003-10-01	0.16155
2004-01-01	0.59858
2004-04-01	-0.36268
2004-07-01	-0.27383
2004-10-01	0.13580
2005-01-01	0.21526
2005-04-01	0.30596
2005-07-01	-0.02767
2005-10-01	0.29469
2006-01-01	0.76207
2006-04-01	0.46415
2006-07-01	0.90785
2006-10-01	0.25364
2007-01-01	0.56323
2007-04-01	0.19966
2007-07-01	0.96700
2007-10-01	0.19452
2008-01-01	1.05822
2008-04-01	1.47458
2008-07-01	-0.24473
2008-10-01	-5.29008
2009-01-01	0.54137
2009-04-01	2.46369
2009-07-01	0.91885
2009-10-01	0.16484
2010-01-01	0.07646
2010-04-01	-0.56502
2010-07-01	-0.30028
2010-10-01	-1.79531
2011-01-01	0.42379
2011-04-01	0.14188
2011-07-01	0.66864
2011-10-01	0.81741
2012-01-01	0.37446
2012-04-01	0.47777
2012-07-01	0.60282
2012-10-01	-1.65398
2013-01-01	0.07644
2013-04-01	0.28492
2013-07-01	1.46832
2013-10-01	0.96708
2014-01-01	0.17464
2014-04-01	-0.40220
2014-07-01	-0.01430
2014-10-01	1.29588
2015-01-01	0.06817
2015-04-01	0.44113