Quarter	Billions of US Dollars
1996-01-01	0.35792
1996-07-01	0.02795
1997-01-01	0.41012
1997-04-01	0.46853
1997-07-01	0.69452
1997-10-01	0.05201
1998-01-01	0.20201
1998-04-01	0.12564
1998-07-01	0.11272
1999-01-01	0.06573
1999-04-01	0.03263
1999-07-01	0.03280
1999-10-01	0.11427
2005-07-01	0.01937
2005-10-01	0.36414
2006-10-01	0.23112
2007-04-01	0.07052
2007-10-01	0.25051
2008-01-01	0.06912
2008-04-01	0.12592
2008-07-01	0.30714
2008-10-01	0.12016
2009-01-01	0.00574
2009-04-01	0.03617
2009-07-01	0.18159
2009-10-01	0.01521
2010-01-01	0.02742
2010-04-01	0.04646
2010-07-01	0.06880
2010-10-01	0.06283
2011-01-01	0.00007
2011-04-01	0.11521
2011-10-01	0.02261
2012-04-01	0.01477
2013-01-01	0.09618
2013-04-01	0.13793
2013-07-01	0.11160
2013-10-01	0.07229
2014-01-01	0.10576
2014-04-01	0.07113
2014-10-01	0.04460
2015-01-01	0.09454
2015-04-01	0.04185