Quarter	Billions of US Dollars
2001-04-01	0.26014
2001-07-01	0.28012
2001-10-01	0.27036
2002-01-01	0.26763
2002-10-01	0.15730
2003-01-01	0.16343
2003-04-01	0.17141
2003-07-01	0.17478
2004-10-01	0.40863
2005-01-01	0.38892
2005-04-01	0.36276
2005-07-01	0.36126
2007-04-01	0.81030
2007-07-01	0.85074
2007-10-01	0.88326
2008-01-01	0.94872
2009-07-01	1.02501
2009-10-01	1.00842
2010-01-01	0.94353
2010-04-01	0.85897
2011-04-01	1.01171
2011-07-01	0.94521
2011-10-01	0.90573
2012-01-01	0.93492
2014-01-01	1.37880
2014-04-01	2.04870
2014-07-01	1.88745
2014-10-01	1.82115
2015-01-01	0.53795
2015-04-01	1.67835