Quarter	Billions of US Dollars
2005-07-01	0.00201
2005-10-01	0.00201
2006-01-01	0.00201
2006-07-01	0.01788
2006-10-01	0.10778
2007-01-01	0.06279
2007-04-01	0.06586
2007-07-01	0.05238
2007-10-01	0.02932
2008-01-01	0.02059
2008-04-01	0.05410
2008-07-01	0.03479
2008-10-01	0.00517
2011-07-01	0.00700
2011-10-01	0.11897
2012-01-01	0.08665
2012-04-01	0.22908
2012-07-01	0.26978
2012-10-01	0.12254
2013-01-01	0.10362
2013-04-01	0.23904
2013-07-01	0.28858
2013-10-01	0.28253
2014-01-01	0.26552
2014-04-01	0.21473
2014-07-01	0.20823
2014-10-01	0.25754
2015-01-01	0.20646
2015-04-01	0.20783