Quarter	Billions of US Dollars
1989-01-01	0.02500
1989-04-01	0.03500
1989-07-01	0.04500
1989-10-01	0.05500
1990-01-01	0.02000
1995-10-01	0.03335
1996-01-01	0.02870
1996-04-01	0.07500
1996-07-01	0.06500
1996-10-01	0.04500
1997-01-01	0.07500
1997-04-01	0.14500
1997-07-01	0.29650
1997-10-01	0.32250
1998-01-01	0.27522
1998-04-01	0.18922
1998-07-01	0.08500
1998-10-01	0.02150
1999-01-01	0.01550
1999-04-01	0.01050
2002-10-01	0.02500
2003-01-01	0.12500
2003-04-01	0.12500
2003-07-01	0.10000
2003-10-01	0.15155
2004-01-01	0.22200
2004-04-01	0.45195
2004-07-01	0.59695
2004-10-01	0.62180
2005-01-01	0.55550
2005-04-01	0.67550
2005-07-01	0.37200
2005-10-01	0.42588
2006-01-01	1.16358
2006-04-01	1.24486
2006-07-01	1.52533
2006-10-01	1.08560
2007-01-01	0.70588
2007-04-01	1.08931
2007-07-01	0.80167
2007-10-01	1.92632
2008-01-01	2.36035
2008-04-01	2.58838
2008-07-01	2.52816
2008-10-01	1.77356
2009-01-01	1.46665
2009-04-01	1.50004
2009-07-01	2.09812
2009-10-01	1.50733
2010-01-01	1.54137
2010-04-01	1.57138
2010-07-01	1.46516
2010-10-01	1.16890
2011-01-01	1.24831
2011-04-01	1.61701
2011-07-01	1.45901
2011-10-01	1.29145
2012-01-01	2.87207
2012-04-01	2.72366
2012-07-01	3.81391
2012-10-01	1.95675
2013-01-01	2.09109
2013-04-01	2.32501
2013-07-01	2.31714
2013-10-01	1.53261
2014-01-01	1.11387
2014-04-01	0.87959
2014-07-01	0.47844
2014-10-01	1.81454
2015-01-01	1.81720
2015-04-01	1.61866