Quarter	Billions of US Dollars
1997-04-01	0.01196
1999-04-01	0.02700
1999-07-01	0.04100
1999-10-01	0.00300
2000-01-01	0.01080
2000-04-01	0.10000
2000-10-01	0.08000
2001-07-01	0.00850
2008-10-01	0.01457
2009-01-01	0.03415
2009-04-01	0.20406
2009-07-01	0.20339
2009-10-01	0.00836
2010-01-01	0.06950
2010-04-01	0.32547
2010-07-01	0.01398
2010-10-01	0.08498
2011-04-01	0.08445
2011-07-01	0.09099
2011-10-01	0.06912
2012-01-01	0.07002
2012-04-01	0.44422
2012-07-01	0.15775
2012-10-01	0.06657
2013-01-01	0.04069
2013-04-01	0.11296
2013-07-01	0.11620
2013-10-01	0.05780
2014-01-01	0.03113
2014-04-01	0.02350
2014-07-01	0.00100
2015-04-01	0.14482