Quarter	Billions of US Dollars
1983-07-01	0.03790
1984-01-01	0.10000
1985-04-01	0.19620
1987-04-01	0.08480
1988-07-01	-0.05359
1988-10-01	0.08280
1990-04-01	-0.04622
1992-04-01	-0.09292
1993-10-01	-0.08915
1994-04-01	-0.15000
1994-07-01	-0.10000
1995-07-01	0.06000
1996-07-01	0.06000
1997-07-01	0.72544
1998-07-01	-0.06000
1998-10-01	0.09359
1999-04-01	0.21135
1999-10-01	0.10000
2000-01-01	0.18681
2000-07-01	0.10000
2001-04-01	0.12231
2001-07-01	-0.06000
2002-04-01	0.58258
2002-07-01	-0.15000
2002-10-01	-0.10000
2003-01-01	0.50000
2003-04-01	0.25000
2003-07-01	0.23450
2004-04-01	0.61474
2004-07-01	-0.62886
2004-10-01	0.06202
2005-01-01	0.00002
2005-04-01	0.41974
2005-07-01	0.40002
2005-10-01	0.50002
2006-01-01	0.50002
2006-04-01	-0.25116
2006-07-01	0.30002
2006-10-01	0.00002
2007-01-01	0.00002
2007-04-01	0.60943
2007-07-01	0.14977
2007-10-01	-0.01806
2008-01-01	-0.16006
2008-04-01	-0.09262
2008-07-01	-0.02964
2008-10-01	-0.00678
2009-01-01	-0.07431
2009-04-01	0.49798
2009-07-01	-0.07558
2009-10-01	0.71952
2010-01-01	1.20737
2010-04-01	0.73705
2010-07-01	-0.03266
2010-10-01	0.11223
2011-01-01	-0.72672
2011-04-01	-0.00078
2011-07-01	-0.34341
2011-10-01	1.11157
2012-01-01	0.05353
2012-04-01	-0.03898
2012-07-01	1.49472
2012-10-01	0.84629
2013-01-01	-0.34998
2013-04-01	0.50931
2013-07-01	1.42600
2013-10-01	-0.11780
2014-01-01	-0.01770
2014-04-01	-0.61081
2014-07-01	1.24137
2014-10-01	-0.35648
2015-01-01	0.97760
2015-04-01	-0.47858