Quarter	Billions of US Dollars
1992-07-01	0.10000
1993-10-01	-0.02500
1994-01-01	0.10596
1994-04-01	0.13976
1994-07-01	0.07969
1994-10-01	0.00168
1995-01-01	-0.05860
1995-04-01	-0.06326
1995-07-01	-0.16110
1995-10-01	0.21641
1996-01-01	-0.00113
1996-04-01	-0.01530
1996-07-01	0.20178
1996-10-01	0.12691
1997-01-01	-0.02527
1997-04-01	0.04140
1997-07-01	-0.06216
1997-10-01	0.03093
1998-01-01	-0.05992
1998-04-01	0.17730
1998-07-01	0.04331
1998-10-01	-0.01258
1999-01-01	-0.08688
1999-04-01	0.02655
1999-07-01	0.03790
1999-10-01	0.01973
2000-01-01	-0.00615
2000-04-01	-0.01133
2000-07-01	0.07015
2000-10-01	-0.00198
2001-01-01	-0.01690
2001-04-01	-0.00133
2001-07-01	-0.04335
2001-10-01	-0.07595
2002-01-01	-0.04925
2002-04-01	-0.00993
2002-07-01	-0.01327
2002-10-01	0.00022
2003-01-01	0.00140
2003-04-01	0.00009
2003-07-01	-0.07848
2003-10-01	-0.00172
2004-01-01	-0.06840
2004-04-01	-0.00110
2004-07-01	0.00352
2004-10-01	0.01438
2005-01-01	-0.03252
2005-04-01	-0.00356
2005-07-01	0.00970
2006-01-01	-0.02994
2006-04-01	0.02600
2006-10-01	0.11500
2007-01-01	0.15000
2007-04-01	0.16500
2007-07-01	-0.04670
2007-10-01	-0.02653
2008-01-01	0.02000
2008-04-01	0.00820
2008-07-01	-0.06646
2008-10-01	-0.02600
2009-01-01	-0.00001
2009-04-01	0.02685
2009-07-01	0.05000
2009-10-01	-0.01151
2010-04-01	-0.03440
2010-07-01	0.26500
2010-10-01	0.12983
2011-01-01	0.20000
2011-04-01	-0.01060
2011-07-01	-0.01500
2011-10-01	-0.10000
2012-04-01	-0.01745
2012-07-01	-0.00001
2013-01-01	0.00001
2013-07-01	0.37500
2014-10-01	0.08711
2015-01-01	-0.00805