Quarter	Billions of US Dollars
1993-07-01	2.42847
1993-10-01	2.70523
1994-01-01	2.47969
1994-04-01	2.54013
1994-07-01	2.43424
1994-10-01	2.22588
1995-01-01	1.98099
1995-04-01	2.12072
1995-07-01	2.41963
1995-10-01	3.52558
1996-01-01	3.35283
1996-04-01	2.75416
1996-07-01	3.14619
1996-10-01	3.91290
1997-01-01	4.03281
1997-04-01	4.61130
1997-07-01	4.78077
1997-10-01	3.23736
1998-01-01	2.95091
1998-04-01	2.39153
1998-07-01	3.06460
1998-10-01	2.77911
1999-01-01	1.87029
1999-04-01	1.30523
1999-07-01	0.54630
1999-10-01	0.80726
2000-01-01	0.83781
2000-04-01	1.09411
2000-07-01	0.99789
2000-10-01	0.96005
2001-01-01	0.80888
2001-04-01	0.69080
2001-07-01	0.75819
2001-10-01	0.46583
2002-01-01	0.37490
2002-04-01	0.25210
2002-07-01	0.09253
2002-10-01	0.02221
2003-04-01	0.03100
2003-07-01	0.02900
2003-10-01	0.02900
2004-01-01	0.01500
2004-04-01	0.01500
2004-07-01	0.02750
2004-10-01	0.02750
2005-01-01	0.02735
2005-04-01	0.02747
2005-07-01	0.01500
2005-10-01	0.22504
2006-01-01	0.27781
2006-04-01	0.13690
2006-07-01	0.13684
2006-10-01	0.31395
2007-01-01	0.36228
2007-04-01	1.33091
2007-07-01	1.60157
2007-10-01	1.90786
2008-01-01	2.32449
2008-04-01	1.33789
2008-07-01	0.87326
2008-10-01	0.57515
2009-01-01	0.91420
2009-04-01	0.96349
2009-07-01	1.15697
2009-10-01	1.09451
2010-01-01	0.39815
2010-04-01	0.30570
2010-07-01	0.12386
2010-10-01	0.15974
2011-01-01	0.19867
2011-04-01	0.21432
2011-07-01	1.36744
2011-10-01	1.81408
2012-01-01	1.87106
2012-04-01	1.78988
2012-07-01	0.79196
2012-10-01	0.78273
2013-01-01	1.04395
2013-04-01	2.03247
2013-07-01	2.16248
2013-10-01	2.19724
2014-01-01	1.89404
2014-04-01	0.98820
2014-07-01	1.17084
2014-10-01	0.73081
2015-01-01	0.69635
2015-04-01	0.64949