Quarter	Billions of US Dollars
2007-07-01	0.04274
2007-10-01	0.04442
2008-01-01	0.05031
2008-04-01	0.04913
2009-01-01	0.60000
2009-04-01	0.60000
2009-07-01	0.61000
2009-10-01	1.30000
2010-01-01	0.70000
2010-04-01	1.70000
2010-07-01	1.70000
2010-10-01	1.00000
2011-01-01	1.00000
2011-04-01	0.65000
2011-07-01	1.80000
2011-10-01	1.70000
2012-01-01	1.65000
2012-04-01	1.00000
2012-10-01	0.98955
2013-01-01	0.96037
2013-04-01	0.98100
2013-07-01	1.01288
2014-01-01	1.30332
2014-04-01	1.30355
2014-07-01	2.81113
2014-10-01	3.84172
2015-01-01	2.54588
2015-04-01	2.53303