Quarter	Billions of US Dollars
1975-07-01	0.01910
1976-01-01	0.02820
1977-07-01	0.02250
1980-07-01	0.00960
1982-07-01	-0.01500
1983-01-01	-0.00756
1984-07-01	0.02500
1985-07-01	-0.01755
1985-10-01	0.03800
1986-01-01	0.23390
1986-10-01	0.15000
1987-04-01	0.07060
1987-07-01	-0.01710
1989-01-01	0.04000
1989-04-01	-0.02585
1990-04-01	-0.07679
1990-07-01	0.30070
1990-10-01	-0.15000
1991-07-01	-0.02500
1992-07-01	0.20000
1993-04-01	-0.20000
1993-07-01	0.11000
1994-10-01	1.01500
1995-04-01	0.00800
1995-10-01	-0.38231
1996-01-01	0.21257
1996-04-01	0.31919
1996-07-01	0.15489
1996-10-01	0.14238
1997-01-01	0.86605
1997-04-01	0.49293
1997-07-01	0.16850
1997-10-01	0.54654
1998-01-01	0.70870
1998-04-01	-0.41136
1998-07-01	1.10584
1998-10-01	0.76448
1999-01-01	0.97182
1999-04-01	0.01007
1999-07-01	0.81174
1999-10-01	-1.31472
2000-01-01	-0.19679
2000-04-01	0.43495
2000-07-01	0.85832
2000-10-01	2.17150
2001-01-01	0.28152
2001-04-01	0.31044
2001-07-01	-2.88073
2001-10-01	-0.70552
2002-01-01	-0.15814
2002-04-01	0.07119
2002-07-01	-0.47045
2002-10-01	-0.01854
2003-01-01	-0.03157
2003-04-01	-0.20654
2003-07-01	-0.10573
2003-10-01	0.26020
2004-01-01	0.31178
2004-04-01	0.86703
2004-07-01	-0.31867
2004-10-01	0.15666
2005-01-01	0.03401
2005-04-01	-0.16683
2005-07-01	-0.22385
2005-10-01	1.74149
2006-01-01	-0.01525
2006-04-01	1.46350
2006-07-01	0.91573
2006-10-01	0.19280
2007-01-01	0.13091
2007-04-01	2.04630
2007-07-01	-0.24655
2007-10-01	0.11708
2008-01-01	-0.23329
2008-04-01	2.52814
2008-07-01	0.04454
2008-10-01	-0.51286
2009-01-01	-0.90387
2009-04-01	0.57515
2009-07-01	0.32794
2009-10-01	0.99482
2010-01-01	-0.07250
2010-04-01	0.80011
2010-07-01	-0.07586
2010-10-01	1.27354
2011-01-01	0.43878
2011-04-01	-1.05498
2011-07-01	0.89718
2011-10-01	1.25770
2012-01-01	1.87826
2012-04-01	1.25106
2012-07-01	0.84505
2012-10-01	0.41494
2013-01-01	1.79672
2013-04-01	-2.24351
2013-07-01	4.62026
2013-10-01	5.78839
2014-01-01	-0.62901
2014-04-01	8.68120
2014-07-01	3.32229
2014-10-01	5.60647
2015-01-01	-0.82647
2015-04-01	2.96950