Quarter	Billions of US Dollars
2006-04-01	0.10784
2006-07-01	0.34456
2006-10-01	0.34992
2007-01-01	0.51161
2007-04-01	0.52575
2007-07-01	0.67051
2007-10-01	0.67630
2008-01-01	0.71018
2008-04-01	0.70701
2008-07-01	0.71045
2008-10-01	0.70447
2009-01-01	0.56186
2009-04-01	0.58034
2009-07-01	0.56414
2009-10-01	0.57430
2010-01-01	0.45861
2010-04-01	0.45633
2010-07-01	0.43152
2010-10-01	0.53103
2011-01-01	0.50600
2011-04-01	0.50533
2011-07-01	0.34426
2011-10-01	0.39277
2012-01-01	0.39476
2012-04-01	0.39561
2012-07-01	0.33801
2012-10-01	0.38513
2013-01-01	0.33581
2013-04-01	0.33402
2013-07-01	0.32933
2013-10-01	0.27115
2014-01-01	0.22945
2014-04-01	0.11864
2014-07-01	0.23848
2014-10-01	0.23789
2015-01-01	0.23366
2015-04-01	0.22858