Quarter	Billions of US Dollars
2010-07-01	0.12868
2010-10-01	0.06000
2011-01-01	0.50081
2011-04-01	-0.17999
2011-07-01	-0.01710
2011-10-01	-0.04714
2012-01-01	0.04206
2012-04-01	0.21956
2012-07-01	0.03191
2012-10-01	0.17853
2013-01-01	-0.06436
2013-04-01	-0.16914
2013-07-01	-0.30161
2013-10-01	0.19636
2014-01-01	0.37187
2014-04-01	0.70220
2014-07-01	0.23094
2014-10-01	-0.25247
2015-01-01	-0.49774
2015-04-01	-0.16706