Quarter	Billions of US Dollars
1993-07-01	0.52743
1993-10-01	0.21090
1994-01-01	0.25804
1994-04-01	-0.17016
1994-07-01	0.76796
1994-10-01	-0.21865
1995-01-01	0.28556
1995-04-01	0.07491
1995-07-01	-0.18875
1995-10-01	-0.06458
1996-01-01	-0.07192
1996-04-01	0.11545
1996-07-01	-0.48076
1996-10-01	0.57470
1997-01-01	0.13941
1997-04-01	0.14652
1997-07-01	-0.46030
1997-10-01	0.62900
1998-01-01	-0.42626
1998-04-01	-0.51992
1998-07-01	-0.17018
1998-10-01	0.55770
1999-01-01	-0.39300
1999-04-01	-0.17889
1999-07-01	0.38413
1999-10-01	-0.05137
2000-01-01	0.32177
2000-04-01	0.06957
2000-07-01	-0.16147
2000-10-01	0.72654
2001-01-01	-0.12624
2001-04-01	0.46077
2001-07-01	-0.43547
2001-10-01	-0.17364
2002-01-01	-0.22425
2002-04-01	0.14034
2002-07-01	0.42499
2002-10-01	-0.58190
2003-01-01	1.90756
2003-04-01	-0.52691
2003-07-01	-0.80803
2003-10-01	0.03538
2004-01-01	1.36990
2004-04-01	0.60976
2004-07-01	0.27949
2004-10-01	2.64479
2005-01-01	-0.39510
2005-04-01	-1.19207
2005-07-01	-0.11122
2005-10-01	-1.53335
2006-01-01	-0.16607
2006-04-01	-0.19719
2006-07-01	-0.32444
2006-10-01	-0.06642
2007-01-01	-0.87480
2007-04-01	0.41759
2007-07-01	0.45643
2007-10-01	1.94337
2008-01-01	2.17808
2008-04-01	-3.30471
2008-07-01	-2.09433
2008-10-01	-1.17493
2009-01-01	-0.11282
2009-04-01	-0.33814
2009-07-01	-0.55273
2009-10-01	0.19950
2010-01-01	-0.00931
2010-04-01	0.13210
2010-07-01	-0.17207
2010-10-01	0.33302
2011-01-01	0.81534
2011-04-01	-0.57038
2011-07-01	0.34333
2011-10-01	-0.06037
2012-01-01	-0.16432
2012-04-01	0.00210
2012-07-01	0.02560
2012-10-01	0.82561
2013-01-01	0.57188
2013-04-01	-1.77669
2013-07-01	0.01157
2013-10-01	1.30492
2014-01-01	-0.07140
2014-04-01	-0.33521
2014-07-01	-0.39492
2014-10-01	-0.21588
2015-01-01	-0.28193
2015-04-01	0.21476