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
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
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	0.31950
1990-10-01	0.23500
1991-04-01	0.13770
1991-07-01	-0.00687
1991-10-01	0.03340
1992-01-01	0.07590
1992-04-01	-0.17750
1992-07-01	0.19210
1992-10-01	0.32640
1993-01-01	-0.02438
1993-10-01	-0.08330
1994-01-01	0.25900
1994-04-01	0.96452
1994-07-01	0.32400
1994-10-01	0.22500
1995-01-01	-0.53000
1995-07-01	0.21510
1995-10-01	0.41400
1996-01-01	1.41110
1996-04-01	0.97297
1996-07-01	1.27971
1996-10-01	2.58616
1997-01-01	1.35667
1997-04-01	1.03159
1997-07-01	2.33285
1997-10-01	2.11940
1998-01-01	-0.83069
1998-04-01	0.43876
1998-07-01	-0.06559
1998-10-01	-0.24242
1999-01-01	-0.38346
1999-04-01	-0.14915
1999-07-01	-2.05857
1999-10-01	-1.37200
2000-01-01	0.12114
2000-04-01	-0.98466
2000-07-01	-0.37717
2000-10-01	-0.50900
2001-01-01	-0.61299
2001-04-01	-0.62600
2001-07-01	-0.29400
2001-10-01	-0.30500
2002-01-01	-0.32636
2002-04-01	0.31426
2002-07-01	-0.27090
2002-10-01	0.05000
2003-01-01	-0.19500
2003-04-01	0.47000
2003-07-01	0.25000
2003-10-01	-0.07000
2004-01-01	1.00500
2004-07-01	-0.33000
2005-01-01	0.20000
2005-04-01	1.40000
2005-07-01	0.65500
2005-10-01	1.32100
2006-01-01	2.00000
2006-04-01	-0.33750
2006-07-01	-0.23200
2006-10-01	2.42500
2007-01-01	1.25000
2007-04-01	1.99000
2007-07-01	-0.89200
2007-10-01	-0.51000
2008-01-01	2.00000
2008-04-01	1.60000
2008-07-01	-0.18225
2008-10-01	-0.30100
2009-01-01	5.00000
2009-04-01	0.55000
2009-07-01	1.78364
2009-10-01	3.00222
2010-01-01	3.14155
2010-04-01	0.25686
2010-07-01	-0.29932
2010-10-01	1.34393
2011-01-01	-0.33000
2011-04-01	3.69981
2011-07-01	-0.76800
2011-10-01	1.74950
2012-01-01	4.10498
2012-04-01	5.63500
2012-07-01	-0.76973
2012-10-01	1.68366
2013-01-01	1.99000
2013-04-01	5.15649
2013-07-01	2.55000
2013-10-01	0.15000
2014-01-01	2.79345
2014-04-01	1.27967
2014-07-01	4.12040
2014-10-01	0.72890
2015-01-01	6.13765
2015-04-01	7.60325