Quarter	Billions of US Dollars
2007-07-01	1.00000
2008-04-01	1.76991
2009-04-01	6.00000
2010-10-01	1.43489
2011-04-01	0.50000
2012-07-01	-1.00000
2013-04-01	-1.76991
2014-04-01	-3.04200
2014-07-01	0.00300
2014-10-01	-0.00300
2015-01-01	0.91403
2015-04-01	-0.00300