Quarter	Billions of US Dollars
2010-10-01	0.06000
2011-01-01	0.19699
2011-04-01	-0.17999
2011-07-01	-0.01710
2011-10-01	-0.04714
2012-01-01	0.20059
2012-04-01	0.21956
2012-07-01	-0.02080
2012-10-01	0.03817
2013-01-01	0.12607
2013-04-01	-0.15947
2013-07-01	-0.18056
2013-10-01	0.23272
2014-01-01	0.40578
2014-04-01	0.61553
2014-07-01	-0.10528
2014-10-01	-0.17771
2015-01-01	-0.49774
2015-04-01	-0.09328