Quarter	Billions of US Dollars
2008-01-01	1.05308
2008-04-01	2.45918
2008-07-01	1.07273
2009-01-01	0.18897
2009-04-01	0.10671
2009-07-01	0.94740
2009-10-01	0.48260
2010-01-01	1.05945
2010-04-01	0.54729
2010-07-01	0.64896
2010-10-01	0.67478
2011-01-01	0.95329
2011-04-01	0.52464
2011-07-01	0.43615
2011-10-01	1.03189
2012-01-01	0.40068
2012-10-01	0.13194
2013-04-01	0.39240
2013-07-01	0.60773
2013-10-01	0.41373
2014-01-01	0.52946
2014-04-01	0.31413
2014-07-01	0.31458
2014-10-01	0.30353
2015-01-01	0.37657
2015-04-01	0.39161