Quarter	Billions of US Dollars
1987-04-01	-0.03565
1988-01-01	-0.07813
1988-10-01	-0.05000
1989-01-01	-0.07164
1989-04-01	0.06800
1989-10-01	-0.01500
1990-04-01	-0.13647
1990-07-01	0.36980
1990-10-01	-0.02500
1991-01-01	-0.03000
1991-04-01	0.05000
1991-07-01	0.23700
1991-10-01	0.23420
1992-01-01	0.09710
1992-04-01	-0.15000
1992-07-01	-0.08500
1992-10-01	0.52500
1993-01-01	-0.13000
1993-04-01	0.23060
1993-07-01	1.25298
1993-10-01	0.72707
1994-01-01	1.53468
1994-04-01	0.53669
1994-07-01	0.00174
1994-10-01	-0.62423
1995-01-01	-0.94040
1995-04-01	-0.66220
1995-07-01	0.23368
1995-10-01	-0.24597
1996-01-01	-0.23800
1996-04-01	0.03000
1996-07-01	-0.03700
1996-10-01	-0.03654
1997-01-01	-0.15540
1997-04-01	-0.03050
1997-07-01	-0.09000
1997-10-01	-0.05000
1998-01-01	0.13949
1998-04-01	-0.06567
1998-10-01	-0.32517
1999-01-01	-0.01747
1999-04-01	0.03300
1999-07-01	-0.05440
1999-10-01	-0.19300
2000-01-01	-0.03560
2000-04-01	0.09500
2000-07-01	-0.55000
2000-10-01	-0.17000
2001-04-01	-0.04998
2002-01-01	-0.00922
2003-01-01	-0.12188
2003-07-01	-0.20000
2003-10-01	-0.20000
2004-01-01	-0.60000
2004-10-01	0.03000
2006-01-01	-0.00800
2006-04-01	-0.25000
2007-01-01	0.12000
2007-07-01	0.10000
2009-01-01	-0.40000
2009-04-01	3.00000
2010-04-01	1.00000
2010-07-01	0.30000
2011-01-01	1.97800
2011-04-01	0.02300
2012-04-01	0.15000
2012-07-01	1.50000
2012-10-01	1.00000
2013-04-01	0.13802
2013-07-01	-0.12000
2013-10-01	1.27000
2014-04-01	1.74231
2014-10-01	0.20000