Quarter	Billions of US Dollars
2006-07-01	0.01800
2007-01-01	0.60000
2007-04-01	0.65000
2007-07-01	2.50000
2008-10-01	0.94405
2010-01-01	-0.15000
2010-10-01	1.00000
2011-10-01	0.99995
2012-04-01	-0.65000
2012-07-01	-1.00000
2013-04-01	0.45900
2013-07-01	0.00100
2013-10-01	1.27492
2014-04-01	0.40000
2015-01-01	-0.45000
2015-04-01	0.01070