Quarter	Billions of US Dollars
2005-01-01	25.928
2005-04-01	24.386
2005-07-01	16.342
2005-10-01	15.244
2006-01-01	13.762
2006-04-01	8.608
2006-07-01	13.981
2006-10-01	8.603
2007-01-01	8.660
2007-04-01	11.244
2007-07-01	8.653
2007-10-01	8.849
2008-01-01	5.024
2008-04-01	4.870
2008-07-01	10.482
2008-10-01	11.694
2009-01-01	11.509
2009-04-01	12.643
2009-07-01	14.208
2009-10-01	12.880
2010-01-01	12.266
2010-04-01	9.350
2010-07-01	6.515
2010-10-01	7.219
2011-01-01	6.477
2011-04-01	8.187
2011-07-01	5.569
2011-10-01	5.001
2012-01-01	7.177
2012-04-01	9.549
2012-07-01	11.383
2012-10-01	12.629
2013-01-01	12.330
2013-04-01	11.247
2013-07-01	9.632
2013-10-01	10.517
2014-01-01	10.532
2014-04-01	11.758
2014-07-01	12.137
2014-10-01	12.040
2015-01-01	11.054