Quarter	Billions of US Dollars
1993-10-01	0.05000
1994-07-01	0.12500
1994-10-01	0.03000
1995-04-01	0.12500
1996-04-01	-0.04000
1996-07-01	0.08536
1996-10-01	-0.03000
1997-10-01	0.00000
1998-10-01	-0.05000
1999-07-01	-0.12500
2000-04-01	-0.11000
2001-07-01	-0.09857
2007-04-01	0.40000
2010-07-01	0.62000
2011-01-01	0.52000
2011-04-01	1.00000
2011-10-01	0.60000
2012-07-01	1.95000
2013-01-01	1.00000
2013-04-01	0.30000
2014-01-01	-0.99564
2014-07-01	-0.52000
2015-04-01	0.40000