Quarter	Billions of US Dollars
2009-07-01	0.01000
2009-10-01	-0.01000
2011-07-01	0.15000
2011-10-01	-0.10000
2012-01-01	-0.05000
2014-01-01	0.00988
2014-07-01	0.00831
2014-10-01	0.03185
2015-04-01	-0.01533