Quarter	Billions of US Dollars
2008-01-01	3.646
2008-04-01	2.725
2008-07-01	3.439
2008-10-01	2.721
2009-01-01	4.400
2009-04-01	4.733
2009-07-01	7.404
2009-10-01	8.048
2010-01-01	9.257
2010-04-01	5.045
2010-07-01	6.150
2010-10-01	3.841
2011-01-01	6.556
2011-04-01	7.870
2011-07-01	7.791
2011-10-01	2.140
2012-01-01	7.455
2012-04-01	4.899
2012-07-01	5.306
2012-10-01	0.270
2013-01-01	5.109
2013-04-01	5.446
2013-07-01	5.505
2013-10-01	2.138
2014-01-01	4.120
2014-04-01	6.133
2014-07-01	5.902
2014-10-01	2.122
2015-01-01	4.461