Quarter	Billions of US Dollars
1985-01-01	0.01920
1986-07-01	0.02590
1988-04-01	0.04010
1990-01-01	-0.03381
1991-07-01	-0.03135
1994-04-01	0.01350
1994-10-01	0.03000
1996-04-01	-0.01350
1996-07-01	0.01350
1997-04-01	-0.01350
1997-10-01	0.00000
1998-04-01	-0.03683
1999-10-01	-0.03000
2000-04-01	0.10000
2001-10-01	0.15000
2004-10-01	0.01363
2005-01-01	0.21448
2005-04-01	0.00559
2005-07-01	-0.00721
2005-10-01	0.11466
2006-01-01	-0.00053
2006-04-01	0.15000
2006-07-01	0.02500
2006-10-01	0.05000
2007-04-01	0.01000
2007-07-01	0.02700
2007-10-01	0.05350
2008-01-01	0.34272
2008-07-01	0.00500
2008-10-01	-0.01500
2009-01-01	-0.02080
2009-04-01	-0.02500
2009-07-01	0.00500
2009-10-01	0.43821
2010-01-01	-0.20823
2010-04-01	0.08500
2010-07-01	0.20000
2010-10-01	-0.01026
2011-07-01	-0.14091
2011-10-01	-0.00500
2012-04-01	0.01200
2012-07-01	0.25000
2012-10-01	-0.00850
2013-04-01	0.47205
2013-07-01	0.00746
2013-10-01	0.02176
2014-01-01	1.25000
2014-04-01	-0.45000
2014-10-01	-0.19000