Quarter	Billions of US Dollars
1991-10-01	0.05000
1992-01-01	0.05000
1992-04-01	0.35000
1992-07-01	1.09000
1992-10-01	1.09000
1993-01-01	1.59000
1993-04-01	1.59000
1993-07-01	1.59000
1993-10-01	1.54000
1994-01-01	1.54000
1994-04-01	1.54000
1994-07-01	1.54000
1994-10-01	2.19065
1995-01-01	2.21980
1995-04-01	2.29461
1995-07-01	2.38252
1995-10-01	2.40193
1996-01-01	3.23375
1996-04-01	3.19663
1996-07-01	3.17907
1996-10-01	3.13534
1997-01-01	3.06842
1997-04-01	3.16192
1997-07-01	2.80430
1997-10-01	2.30896
1998-01-01	1.78089
1998-04-01	1.70211
1998-07-01	1.75105
1998-10-01	1.96031
1999-01-01	2.00920
1999-04-01	2.00059
1999-07-01	3.61645
1999-10-01	3.29280
2000-01-01	2.99612
2000-04-01	3.02132
2000-07-01	3.04141
2000-10-01	2.95354
2001-01-01	3.04482
2001-04-01	3.11518
2001-07-01	3.17796
2001-10-01	3.01247
2002-01-01	2.99687
2002-04-01	3.16591
2002-07-01	3.13761
2002-10-01	3.07636
2003-01-01	2.90668
2003-04-01	2.91013
2003-07-01	4.86761
2003-10-01	5.54796
2004-01-01	5.46737
2004-04-01	5.41132
2004-07-01	5.28741
2004-10-01	5.37391
2005-01-01	5.33192
2005-04-01	5.27641
2005-07-01	5.19360
2005-10-01	5.13124
2006-01-01	4.66750
2006-04-01	4.61346
2006-07-01	4.59809
2006-10-01	4.59210
2007-01-01	4.01361
2007-04-01	3.97079
2007-07-01	3.92599
2007-10-01	3.93103
2008-01-01	4.00777
2008-04-01	3.97051
2008-07-01	3.98243
2008-10-01	3.46160
2009-01-01	3.39512
2009-04-01	3.40894
2009-07-01	1.95234
2009-10-01	1.93558
2010-01-01	1.92719
2010-04-01	1.96124
2010-07-01	2.00382
2010-10-01	2.02119
2011-01-01	2.00618
2011-04-01	2.02790
2011-07-01	2.06791
2011-10-01	2.05684
2012-01-01	2.01486
2012-04-01	2.04133
2012-07-01	2.05834
2012-10-01	1.97742
2013-01-01	1.92099
2013-04-01	1.89487
2013-07-01	0.64733
2013-10-01	0.60295
2014-01-01	0.61664
2014-04-01	0.62564
2014-07-01	0.58157
2014-10-01	0.52989
2015-01-01	0.51370
2015-04-01	0.50408