Quarter	Billions of US Dollars
1993-07-01	0.31259
1993-10-01	-0.05143
1994-01-01	0.17513
1994-04-01	-0.24314
1994-07-01	-0.31690
1994-10-01	-0.04736
1995-01-01	-0.34431
1995-04-01	-0.86326
1995-07-01	-0.17482
1995-10-01	-0.42910
1996-01-01	-0.46270
1996-04-01	-0.03233
1996-07-01	-0.31485
1996-10-01	-0.43431
1997-01-01	-0.99583
1997-04-01	-0.13204
1997-07-01	0.06953
1997-10-01	0.34442
1998-01-01	-0.23540
1998-04-01	0.01109
1998-07-01	-0.21417
1998-10-01	0.09949
1999-01-01	-0.31693
1999-04-01	-0.00946
1999-07-01	0.00239
1999-10-01	-0.18000
2000-01-01	0.11000
2000-04-01	-0.12943
2000-07-01	-0.19233
2000-10-01	0.02989
2001-01-01	-0.44415
2001-04-01	0.02619
2001-07-01	0.02851
2001-10-01	-0.04342
2002-01-01	-0.08947
2002-04-01	0.03994
2002-07-01	-0.06127
2002-10-01	0.04264
2003-01-01	-0.06419
2003-04-01	0.41031
2003-07-01	-0.06629
2003-10-01	0.13560
2004-01-01	-0.42490
2004-04-01	0.05004
2004-07-01	0.07350
2004-10-01	-0.04350
2005-01-01	-0.39350
2005-04-01	-0.12350
2005-07-01	-0.20000
2005-10-01	-0.11000
2006-01-01	-0.16650
2006-10-01	-0.27500
2007-01-01	-0.02500
2008-01-01	-0.16949
2008-04-01	-0.41352
2008-07-01	0.10000
2008-10-01	-0.10000
2009-01-01	0.10000
2009-07-01	-0.10000
2011-01-01	-0.10000
2011-04-01	0.10000
2012-01-01	0.05549
2012-04-01	-0.26916
2012-07-01	-0.05712
2012-10-01	0.79289
2013-01-01	1.04665
2013-04-01	-1.67950
2013-07-01	0.21553
2014-01-01	0.45550
2014-07-01	-0.00800
2015-04-01	0.30000