Quarter	Billions of US Dollars
2012-01-01	0.66804
2012-04-01	0.64407
2012-07-01	0.65471
2012-10-01	0.66297
2013-01-01	0.65080
2013-04-01	1.30940
2013-07-01	1.32271
2013-10-01	1.33166
2014-01-01	1.33156
2014-04-01	1.32750
2014-07-01	1.29385
2014-10-01	1.23176
2015-01-01	1.18851
2015-04-01	1.20197