Quarter	Billions of US Dollars
2001-04-01	0.38557
2004-07-01	0.12300
2004-10-01	0.06450
2005-01-01	0.16331
2005-04-01	0.09476
2005-07-01	0.60966
2005-10-01	0.35652
2006-01-01	0.71538
2006-04-01	-0.50236
2006-07-01	1.59253
2006-10-01	1.38932
2007-01-01	1.41529
2007-04-01	0.81526
2008-01-01	1.49711
2008-04-01	0.78093
2008-07-01	0.57649
2008-10-01	-0.21927
2009-01-01	-0.97635
2009-04-01	0.06801
2009-07-01	-0.14302
2009-10-01	1.40361
2010-01-01	-0.87175
2010-04-01	-0.66701
2010-07-01	-0.10329
2010-10-01	-0.47544
2011-01-01	-0.66335
2011-04-01	-0.08392
2011-07-01	0.09337
2011-10-01	0.11836
2012-01-01	-0.10856
2012-04-01	-0.52564
2012-07-01	0.36275
2012-10-01	1.13427
2013-10-01	0.00286
2014-01-01	-0.07150
2014-04-01	-0.55974
2014-07-01	-0.98130
2014-10-01	1.08099
2015-01-01	-0.13658
2015-04-01	-0.01914