Quarter	Billions of US Dollars
2011-07-01	0.00790
2011-10-01	0.03133
2012-01-01	0.03261
2012-04-01	0.11635
2012-07-01	0.00040
2012-10-01	0.00435
2013-01-01	0.01953
2013-04-01	0.00576
2013-07-01	0.00738
2013-10-01	0.01616
2014-01-01	-0.08926
2014-04-01	0.51020
2014-07-01	0.02505
2014-10-01	-0.00064
2015-01-01	-0.00725
2015-04-01	0.00227