Quarter	Billions of US Dollars
2005-07-01	0.1068
2005-10-01	0.6551
2006-01-01	1.1643
2006-04-01	1.3964
2006-07-01	3.2210
2006-10-01	4.5295
2007-01-01	10.2043
2007-04-01	10.3906
2007-07-01	9.7863
2007-10-01	8.8939
2008-01-01	7.6247
2008-04-01	7.1184
2008-07-01	7.3604
2008-10-01	9.1879
2009-01-01	8.7316
2009-04-01	11.5033
2009-07-01	12.0632
2009-10-01	8.6197
2010-01-01	7.6951
2010-04-01	7.5607
2010-07-01	9.3514
2010-10-01	8.5802
2011-01-01	11.5289
2011-04-01	11.4331
2011-07-01	9.5523
2011-10-01	9.1557
2012-01-01	7.4022
2012-04-01	7.0564
2012-07-01	7.8813
2012-10-01	7.3920
2013-01-01	8.8348
2013-04-01	11.1646
2013-07-01	14.6888
2013-10-01	20.0311
2014-01-01	19.5026
2014-04-01	16.8329
2014-07-01	13.8205
2014-10-01	11.0115
2015-01-01	10.3467
2015-04-01	16.1492