Quarter	Billions of US Dollars
2012-04-01	0.06410
2012-07-01	0.13024
2012-10-01	2.02906
2013-01-01	0.91601
2013-04-01	0.89762
2013-07-01	-0.17115
2013-10-01	0.38706
2014-01-01	0.51172
2014-04-01	-0.18668
2014-07-01	0.24490
2014-10-01	0.51999
2015-01-01	0.36657
2015-04-01	2.14721