Quarter	Billions of US Dollars
1974-10-01	0.00960
1975-10-01	0.01890
1978-04-01	0.01310
1979-10-01	0.02150
1981-01-01	0.01560
1982-04-01	0.01650
1983-01-01	0.06310
1984-04-01	0.03100
1985-10-01	0.04640
1986-01-01	-0.01517
1987-01-01	0.06710
1987-04-01	-0.02347
1987-10-01	0.04410
1988-04-01	0.14108
1988-07-01	0.02830
1988-10-01	0.02850
1989-01-01	0.00433
1989-04-01	-0.04126
1989-07-01	0.02940
1989-10-01	-0.01556
1990-04-01	-0.00416
1990-10-01	-0.07861
1991-04-01	0.03254
1991-10-01	-0.06622
1992-04-01	-0.00113
1992-10-01	-0.03601
1993-04-01	0.05784
1993-07-01	0.15620
1993-10-01	0.06950
1994-01-01	0.05404
1994-10-01	-0.03857
1995-04-01	0.08640
1995-07-01	0.08640
1995-10-01	-0.03910
1996-01-01	-0.02710
1996-04-01	0.07618
1996-07-01	-0.22650
1997-01-01	-0.06957
1997-10-01	-0.06980
1998-04-01	-0.05358
1999-04-01	0.09967
1999-10-01	0.03188
2000-01-01	-0.06141
2000-10-01	0.13845
2001-04-01	-0.08568
2001-07-01	0.13914
2002-01-01	0.17183
2002-04-01	0.02591
2002-07-01	-0.06439
2002-10-01	0.03514
2003-01-01	-0.05649
2003-04-01	-0.06509
2003-07-01	0.15316
2003-10-01	0.00348
2004-01-01	0.09610
2004-04-01	-0.00011
2004-07-01	-0.00053
2004-10-01	0.13115
2005-01-01	0.00250
2005-04-01	0.20770
2005-07-01	0.00286
2005-10-01	-0.19073
2006-01-01	0.19915
2006-04-01	0.00859
2006-07-01	0.00061
2006-10-01	-0.09261
2007-01-01	0.00210
2007-04-01	0.20730
2007-07-01	0.00313
2007-10-01	-0.18219
2008-01-01	-0.00336
2008-04-01	0.33845
2008-07-01	-0.19122
2009-01-01	-0.10693
2009-04-01	0.24920
2009-07-01	-0.03494
2009-10-01	0.38594
2010-04-01	0.19370
2010-07-01	-0.00926
2011-01-01	-0.21227
2011-04-01	-0.08262
2012-04-01	-0.85425
2012-07-01	0.25895
2013-01-01	0.32841
2013-07-01	-0.26826
2013-10-01	0.22109
2014-01-01	-0.27994
2014-04-01	-0.33759
2015-04-01	0.20791