Quarter	Billions of US Dollars
1972-01-01	0.04900
1972-04-01	0.07780
1972-07-01	0.02970
1972-10-01	0.08580
1973-04-01	0.13550
1973-07-01	0.03780
1973-10-01	0.29490
1974-01-01	0.09370
1974-04-01	0.36320
1974-07-01	0.03040
1974-10-01	0.07240
1975-01-01	0.06400
1975-04-01	0.05750
1975-07-01	0.04550
1976-01-01	0.06080
1976-04-01	0.05590
1976-07-01	0.03690
1976-10-01	0.16690
1977-01-01	0.11710
1977-04-01	0.05170
1977-07-01	0.07340
1977-10-01	0.06780
1978-01-01	0.06450
1978-04-01	0.12860
1978-07-01	0.06240
1978-10-01	0.11000
1979-01-01	0.05000
1979-10-01	0.01500
1980-07-01	0.05000
1983-04-01	-0.05000
1983-10-01	-0.11000
1984-01-01	-0.05000
1984-04-01	-0.00780
1984-10-01	-0.01500
1985-04-01	-0.13550
1985-07-01	-0.08780
1985-10-01	-0.29490
1986-01-01	-0.09370
1986-04-01	-0.06320
1986-07-01	0.07460
1986-10-01	-0.07240
1987-01-01	-0.11300
1987-04-01	-0.12750
1987-07-01	-0.10520
1987-10-01	-0.08580
1988-01-01	-0.06080
1988-04-01	-0.05590
1988-07-01	-0.03690
1988-10-01	-0.07810
1989-01-01	-0.11710
1989-04-01	-0.09510
1989-10-01	-0.06780
1990-01-01	-0.06450
1990-04-01	-0.07860
1990-07-01	-0.06240
1991-04-01	0.94900
1994-04-01	-0.30000
1995-10-01	0.11120
1996-07-01	-0.10500
1996-10-01	0.80000
1997-04-01	0.07500
1997-07-01	0.37313
1997-10-01	0.42500
1998-04-01	-0.01153
1998-07-01	0.38500
1998-10-01	0.25000
1999-01-01	0.50000
1999-04-01	0.42269
1999-10-01	0.76315
2000-01-01	0.85000
2000-04-01	0.12500
2000-07-01	0.44629
2000-10-01	0.10000
2001-04-01	0.60000
2001-10-01	-0.03825
2002-01-01	0.35051
2002-07-01	-0.10000
2002-10-01	0.00720
2003-01-01	0.05080
2003-04-01	0.78860
2003-07-01	0.00744
2003-10-01	0.75003
2004-01-01	0.77337
2004-04-01	0.96500
2004-07-01	-0.08496
2004-10-01	0.87504
2005-01-01	-0.34996
2005-04-01	-0.12497
2005-07-01	-0.27964
2005-10-01	0.69130
2006-01-01	1.39250
2006-04-01	-0.67176
2006-10-01	0.47209
2007-01-01	-0.09920
2007-04-01	0.00000
2007-07-01	-0.58209
2007-10-01	-0.12500
2008-01-01	0.24661
2008-04-01	1.95484
2009-01-01	0.97597
2009-04-01	-0.00342
2009-10-01	-0.60000
2010-01-01	1.57637
2010-04-01	0.70000
2010-07-01	-0.17500
2010-10-01	0.10465
2011-01-01	-0.14500
2011-04-01	-0.60000
2011-07-01	0.00022
2011-10-01	5.00000
2012-01-01	2.08076
2012-04-01	-0.18830
2012-10-01	3.80000
2013-01-01	1.00000
2013-04-01	-2.43000
2013-07-01	0.29980
2013-10-01	-2.10000
2014-01-01	1.55451
2014-04-01	1.58830
2014-07-01	-0.00013
2014-10-01	3.30000
2015-01-01	0.11330