Quarter	Billions of US Dollars
1993-07-01	0.05653
1993-10-01	0.00363
1994-01-01	0.01687
1994-04-01	-0.03417
1994-07-01	0.21330
1994-10-01	-0.14040
1995-01-01	-0.06310
1995-04-01	0.47158
1995-07-01	-0.05500
1995-10-01	0.10819
1996-01-01	0.13847
1996-07-01	-0.23020
1996-10-01	-0.07657
1997-01-01	0.50105
1997-04-01	0.05465
1997-07-01	0.04611
1997-10-01	-0.14276
1998-01-01	0.32655
1998-04-01	-0.07528
1998-07-01	0.07187
1998-10-01	-0.07305
1999-01-01	0.17185
1999-04-01	0.05934
1999-07-01	0.12448
1999-10-01	-0.17213
2000-01-01	-0.01000
2000-04-01	-0.10628
2000-07-01	0.31404
2000-10-01	-0.41325
2001-01-01	-0.02117
2001-04-01	0.38767
2001-07-01	-0.04107
2001-10-01	-0.09881
2002-01-01	0.14640
2002-04-01	1.67496
2002-07-01	-0.01626
2002-10-01	-0.36947
2003-01-01	0.14027
2003-04-01	-0.26376
2003-07-01	-0.38609
2003-10-01	0.07648
2004-01-01	-0.07472
2004-04-01	-0.07645
2004-07-01	-0.06000
2004-10-01	0.04499
2005-01-01	-0.09792
2005-04-01	-0.02698
2005-07-01	0.10878
2005-10-01	-0.05113
2006-01-01	-0.32512
2006-04-01	0.42723
2006-07-01	0.00815
2006-10-01	0.06583
2007-01-01	0.07589
2007-04-01	-0.37991
2007-07-01	-0.30083
2007-10-01	1.36244
2008-01-01	-0.07541
2008-04-01	-0.35749
2008-07-01	-0.63447
2008-10-01	0.12944
2009-01-01	-0.14227
2009-04-01	0.00078
2009-07-01	-0.05860
2009-10-01	0.12500
2010-01-01	0.00010
2010-04-01	0.61775
2010-07-01	0.23200
2010-10-01	3.39500
2011-01-01	2.43139
2011-04-01	-0.50649
2011-07-01	2.64893
2011-10-01	1.09779
2012-01-01	1.55113
2012-04-01	0.12601
2012-07-01	1.33501
2012-10-01	0.03974
2013-01-01	-0.03374
2013-04-01	-0.12828
2013-07-01	0.09240
2013-10-01	-0.16577
2014-01-01	-3.93649
2014-04-01	0.29743
2014-07-01	0.35259
2014-10-01	0.17568
2015-01-01	0.07910
2015-04-01	-0.04527