Quarter	Billions of US Dollars
2008-04-01	0.00128
2009-04-01	-0.00106
2012-01-01	0.17008
2012-04-01	-0.00010
2012-10-01	0.00070
2013-01-01	-0.01759
2013-04-01	0.00313
2013-07-01	0.00018
2013-10-01	-0.00276
2014-01-01	-0.01780
2014-04-01	0.01671
2014-07-01	0.00031
2014-10-01	-0.06332
2015-01-01	0.03440
2015-04-01	-0.01193