Quarter	Billions of US Dollars
1993-07-01	0.08100
1993-10-01	0.00700
1994-01-01	-0.00350
1994-04-01	-0.04800
1994-07-01	-0.07050
1994-10-01	0.00400
1995-01-01	-0.02150
1995-04-01	-0.02550
1995-07-01	-0.01250
1995-10-01	0.00600
1996-01-01	-0.00500
1996-04-01	-0.00500
1996-10-01	0.00100
1997-04-01	-0.01600
1997-10-01	0.00800
1998-04-01	0.00200
1998-10-01	-0.01000
2005-04-01	0.02500
2006-04-01	-0.02500
2006-07-01	0.01543
2007-01-01	0.03996
2007-07-01	-0.01537
2007-10-01	0.03900
2008-01-01	-0.07903
2009-04-01	0.05000
2009-07-01	0.01500
2009-10-01	-0.01500
2010-01-01	0.01500
2010-04-01	0.04300
2010-07-01	0.04080
2010-10-01	-0.02886
2011-01-01	-0.06500
2011-04-01	-0.03226
2011-07-01	-0.02856
2012-01-01	1.41146
2012-04-01	0.20337
2012-07-01	-0.15178
2012-10-01	-0.05901
2013-01-01	-0.63298
2013-04-01	-0.20711
2013-07-01	0.02813
2013-10-01	0.13810
2014-01-01	-0.09957
2014-04-01	-0.21203
2014-07-01	0.04282
2014-10-01	-0.15201
2015-01-01	-0.18560
2015-04-01	0.09514