Quarter	Billions of US Dollars
1993-07-01	0.35125
1993-10-01	0.14984
1994-01-01	0.25833
1994-04-01	-0.44398
1994-07-01	0.42959
1994-10-01	-0.12414
1995-01-01	-0.15918
1995-04-01	0.12611
1995-07-01	-0.02223
1995-10-01	0.05992
1996-01-01	-0.20348
1996-04-01	0.59059
1996-07-01	-0.45576
1996-10-01	0.63539
1997-01-01	0.18548
1997-04-01	0.06314
1997-07-01	-0.40368
1997-10-01	0.67677
1998-01-01	-0.48058
1998-04-01	-0.27401
1998-07-01	-0.06980
1998-10-01	0.54268
1999-01-01	-0.51295
1999-04-01	0.01796
1999-07-01	0.41372
1999-10-01	-0.06966
2000-01-01	0.15170
2000-04-01	-0.07195
2000-07-01	-0.22280
2000-10-01	0.62539
2001-01-01	0.29237
2001-04-01	0.44844
2001-07-01	-0.41417
2001-10-01	-0.21394
2002-01-01	-0.21256
2002-04-01	0.20333
2002-07-01	0.67570
2002-10-01	-1.02131
2003-01-01	0.97445
2003-04-01	-0.65909
2003-07-01	-0.55711
2003-10-01	-0.18175
2004-01-01	0.45796
2004-04-01	0.35820
2004-07-01	0.36996
2004-10-01	1.12078
2005-01-01	-1.16424
2005-04-01	-0.29166
2005-07-01	-0.03020
2005-10-01	-0.78283
2006-01-01	-0.43157
2006-04-01	-0.22802
2006-07-01	-0.03185
2006-10-01	-0.13937
2007-01-01	0.26539
2007-04-01	-0.07461
2007-07-01	-0.29337
2007-10-01	1.00135
2008-01-01	0.14459
2008-04-01	-0.40569
2008-07-01	-0.56447
2008-10-01	-0.38731
2009-01-01	0.09827
2009-04-01	0.01167
2009-07-01	-0.15214
2009-10-01	0.16182
2010-01-01	-0.05692
2010-04-01	-0.01857
2010-07-01	0.02190
2010-10-01	0.26031
2011-01-01	0.82534
2011-04-01	-0.67853
2011-07-01	0.24507
2011-10-01	-0.19057
2012-01-01	0.23924
2012-04-01	-0.03361
2012-07-01	-0.24178
2012-10-01	0.87561
2013-01-01	0.83233
2013-04-01	-1.67364
2013-07-01	0.01157
2013-10-01	0.33202
2014-01-01	-0.06831
2014-04-01	-0.06457
2014-07-01	-0.05093
2014-10-01	-0.21588
2015-01-01	0.07393
2015-04-01	0.19142