Quarter	Billions of US Dollars
2005-07-01	0.10682
2005-10-01	0.65510
2006-01-01	1.13408
2006-04-01	1.36464
2006-07-01	2.95933
2006-10-01	4.22340
2007-01-01	5.38069
2007-04-01	5.36855
2007-07-01	4.96436
2007-10-01	3.60862
2008-01-01	5.09864
2008-04-01	4.55305
2008-07-01	4.74203
2008-10-01	1.28484
2009-01-01	1.17716
2009-04-01	1.16468
2009-07-01	1.32298
2009-10-01	1.17951
2010-01-01	0.57584
2010-04-01	0.34251
2010-07-01	0.39906
2010-10-01	0.22482
2011-01-01	0.30871
2011-04-01	0.29165
2011-07-01	0.37057
2011-10-01	0.22218
2012-01-01	1.65561
2012-04-01	2.26138
2012-07-01	2.73377
2012-10-01	3.13525
2013-01-01	3.55233
2013-04-01	4.39008
2013-07-01	4.86894
2013-10-01	5.50726
2014-01-01	4.78143
2014-04-01	5.86289
2014-07-01	5.87158
2014-10-01	5.60029
2015-01-01	4.84638
2015-04-01	5.55580