Quarter	Billions of US Dollars
1998-04-01	0.25000
1998-07-01	0.25000
1998-10-01	0.25000
1999-01-01	0.25000
2000-10-01	0.03568
2001-01-01	0.03387
2001-04-01	0.03252
2001-07-01	0.03501
2008-04-01	0.44927
2008-07-01	0.40764
2008-10-01	0.39663
2009-01-01	0.37928
2010-07-01	0.08189
2010-10-01	0.08017
2011-01-01	0.08524
2011-04-01	0.08672
2012-01-01	0.22705
2012-04-01	0.21403
2012-07-01	0.21981
2012-10-01	0.22430
2013-04-01	1.96200
2013-07-01	2.16080
2013-10-01	4.27521
2014-01-01	4.27428
2014-04-01	2.18528
2014-07-01	1.88745
2014-10-01	0.36423
2015-01-01	0.32277
2015-04-01	0.33567