Quarter	Billions of US Dollars
1975-10-01	0.01750
1978-07-01	0.10420
1979-01-01	0.03730
1979-07-01	0.02540
1980-07-01	0.04550
1981-04-01	0.04640
1981-10-01	0.02500
1982-04-01	0.20000
1982-07-01	0.03730
1982-10-01	0.07500
1983-01-01	0.03650
1983-07-01	0.29240
1984-07-01	-0.03426
1985-07-01	-0.03197
1985-10-01	-0.04444
1986-01-01	0.30000
1986-10-01	-0.02500
1987-10-01	-0.01750
1988-07-01	-0.07479
1988-10-01	0.16080
1989-01-01	-0.03593
1989-07-01	-0.13353
1990-07-01	0.28000
1990-10-01	0.23500
1991-04-01	0.26270
1991-07-01	-0.00687
1991-10-01	0.03340
1992-01-01	0.07590
1992-04-01	-0.17750
1992-07-01	0.21420
1992-10-01	0.20640
1993-01-01	-0.02438
1993-10-01	0.02670
1994-01-01	0.07936
1994-04-01	1.08952
1994-07-01	0.32400
1994-10-01	0.07500
1995-01-01	-0.53000
1995-07-01	0.12460
1995-10-01	0.33400
1996-01-01	0.15486
1996-04-01	0.21297
1996-07-01	0.63916
1996-10-01	0.74140
1997-01-01	0.77534
1997-04-01	0.30659
1997-07-01	-0.17752
1997-10-01	0.02430
1998-01-01	-0.63393
1998-04-01	0.43876
1998-07-01	-0.06159
1998-10-01	-0.32190
1999-01-01	-0.07446
1999-04-01	-0.00165
1999-07-01	-1.71095
1999-10-01	-0.40000
2000-01-01	0.72827
2000-04-01	-0.78466
2000-07-01	-0.03012
2000-10-01	-0.53900
2001-01-01	-0.36299
2001-04-01	-0.37600
2001-07-01	-0.16500
2002-01-01	-0.07636
2002-04-01	0.13426
2002-07-01	-0.17000
2002-10-01	0.15000
2003-01-01	0.00500
2003-04-01	0.38664
2003-07-01	0.34235
2004-01-01	1.30500
2004-04-01	0.02528
2004-10-01	0.03822
2005-01-01	0.20000
2005-04-01	0.98016
2005-07-01	0.09884
2005-10-01	1.28027
2006-01-01	2.00000
2006-04-01	-0.24159
2006-07-01	-0.40000
2006-10-01	0.06737
2007-01-01	1.35000
2007-04-01	0.87500
2007-10-01	-0.02171
2008-01-01	2.00000
2008-04-01	1.60000
2008-07-01	-0.04685
2008-10-01	-0.30100
2009-01-01	4.70000
2009-04-01	0.55000
2009-07-01	0.93364
2009-10-01	1.29000
2010-01-01	2.86000
2010-04-01	0.25000
2010-07-01	-0.21657
2010-10-01	0.44388
2011-01-01	-0.43500
2011-04-01	4.11500
2011-10-01	2.84000
2012-01-01	4.10498
2012-04-01	5.37500
2012-07-01	-0.08343
2012-10-01	2.42914
2013-01-01	1.22500
2013-04-01	5.13000
2013-07-01	2.55000
2013-10-01	0.15000
2014-01-01	2.73000
2014-04-01	0.80000
2014-07-01	3.86040
2014-10-01	0.78750
2015-01-01	6.33645
2015-04-01	7.04721