Quarter	Billions of US Dollars
2008-01-01	0.0136
2008-04-01	0.0260
2008-07-01	0.0100
2009-04-01	-0.0260
2011-07-01	-0.0100
2012-01-01	0.5000
2012-07-01	-0.0136
2013-01-01	1.0000
2014-01-01	1.2500
2014-04-01	0.5000
2015-01-01	0.7500