Quarter	Billions of US Dollars
2005-10-01	0.01000
2006-01-01	0.01015
2006-04-01	0.02667
2006-07-01	0.10685
2006-10-01	0.15681
2007-01-01	0.32695
2007-04-01	0.39298
2007-07-01	0.54319
2007-10-01	0.82548
2008-01-01	0.98870
2008-04-01	0.93785
2008-07-01	0.73855
2008-10-01	0.72314
2009-01-01	0.60266
2009-04-01	0.61862
2009-07-01	0.63179
2009-10-01	0.64891
2010-01-01	0.48966
2010-04-01	0.43968
2010-07-01	0.48293
2010-10-01	0.47804
2011-01-01	0.36372
2011-04-01	0.34745
2011-07-01	0.33910
2011-10-01	0.31897
2012-01-01	0.32177
2012-04-01	0.28544
2012-07-01	0.29910
2012-10-01	0.18923
2013-01-01	0.18893
2013-04-01	0.18915
2013-07-01	0.31430
2013-10-01	0.31428
2014-01-01	0.25301
2014-04-01	0.24871
2014-07-01	0.23480
2014-10-01	0.22778
2015-01-01	0.21587
2015-04-01	0.22071