Quarter	Billions of US Dollars
1993-07-01	0.13999
1993-10-01	0.00359
1994-01-01	-0.02942
1994-04-01	0.03714
1994-07-01	-0.06279
1994-10-01	0.19418
1995-01-01	-0.04321
1995-04-01	-0.11995
1995-07-01	0.04501
1995-10-01	-0.05751
1996-01-01	0.15132
1996-04-01	-0.00598
1996-07-01	0.09211
1996-10-01	-0.04093
1997-01-01	0.34278
1997-04-01	0.08284
1997-07-01	-0.43947
1997-10-01	0.00094
1998-01-01	-0.26926
1998-04-01	-0.00221
1998-07-01	-0.00700
1998-10-01	-0.02200
1999-01-01	0.06441
1999-04-01	-0.06338
1999-10-01	0.02870
2000-01-01	0.02500
2000-07-01	0.02789
2000-10-01	-0.04086
2001-04-01	-0.01142
2001-07-01	-0.02464
2005-10-01	0.09000
2006-01-01	0.04663
2006-04-01	0.00124
2006-07-01	0.07797
2006-10-01	-0.10000
2007-01-01	0.45946
2007-04-01	-0.26261
2007-07-01	-0.20555
2008-04-01	-0.02770
2008-07-01	0.00320
2008-10-01	-0.02000
2009-07-01	-0.00300
2011-01-01	0.00100
2011-04-01	-0.06914
2011-10-01	-0.00100
2012-01-01	0.00750
2012-04-01	0.47520
2012-07-01	-0.19138
2012-10-01	-0.13473
2013-01-01	0.09151
2013-04-01	0.05592
2013-07-01	0.18234
2013-10-01	0.47784
2014-01-01	0.37772
2014-04-01	0.01410
2014-07-01	-0.20279
2014-10-01	-0.19681
2015-01-01	-0.04500
2015-04-01	-0.16380