Quarter	Billions of US Dollars
1968-04-01	0.00480
1971-01-01	0.01000
1972-01-01	0.01500
1972-04-01	0.00650
1972-10-01	0.01000
1973-07-01	0.00540
1973-10-01	0.01600
1974-04-01	0.00900
1974-10-01	0.01570
1975-07-01	0.00650
1975-10-01	0.01360
1976-01-01	0.01890
1976-07-01	0.01500
1977-01-01	0.04090
1977-04-01	0.01500
1977-10-01	0.01710
1978-01-01	0.02070
1978-07-01	0.00400
1979-01-01	0.01000
1981-01-01	0.03560
1982-01-01	0.01580
1982-04-01	0.05100
1982-10-01	0.05000
1983-01-01	0.02100
1983-04-01	0.02290
1983-10-01	0.02160
1985-04-01	0.12500
1985-07-01	0.06000
1985-10-01	0.03500
1986-04-01	0.04750
1987-01-01	0.06860
1989-01-01	0.08170
1989-04-01	0.10000
1991-04-01	0.13000
1992-01-01	0.10860
1992-07-01	0.07380
1993-01-01	0.07500
1993-04-01	0.31600
1993-10-01	0.03360
1994-01-01	0.24700
1994-07-01	0.11060
1994-10-01	0.06100
1995-01-01	0.16160
1996-01-01	0.16937
1996-07-01	0.06544
1996-10-01	0.03000
1997-01-01	0.08912
1998-01-01	0.07500
1998-07-01	0.04338
1998-10-01	0.02500
1999-01-01	0.24480
1999-04-01	0.18170
1999-07-01	0.22168
1999-10-01	0.02870
2000-01-01	0.48598
2000-04-01	0.28715
2000-07-01	0.20831
2000-10-01	0.48386
2001-01-01	0.26421
2001-04-01	0.49370
2001-07-01	0.05343
2001-10-01	0.37493
2002-01-01	0.39082
2002-04-01	0.56171
2002-07-01	0.23824
2002-10-01	0.11054
2003-01-01	0.32255
2003-04-01	1.05556
2003-07-01	0.97216
2003-10-01	1.19650
2004-01-01	2.64204
2004-04-01	3.05214
2004-07-01	2.07624
2004-10-01	3.38973
2005-01-01	4.36458
2005-04-01	5.60006
2005-07-01	5.89463
2005-10-01	3.33862
2006-01-01	3.00614
2006-04-01	2.78171
2006-07-01	7.11559
2006-10-01	2.90870
2007-01-01	4.47932
2007-04-01	4.09961
2007-07-01	1.88251
2007-10-01	3.19806
2008-01-01	3.42012
2008-04-01	5.04261
2008-07-01	0.58151
2008-10-01	0.01204
2009-01-01	0.00198
2009-07-01	0.03075
2009-10-01	0.00174
2010-01-01	0.00074
2010-04-01	0.51010
2010-07-01	0.10182
2010-10-01	0.05000
2011-04-01	2.10432
2011-07-01	0.13574
2012-01-01	0.00090
2012-04-01	1.00000
2012-07-01	0.00027
2012-10-01	0.00017
2013-01-01	0.00215
2013-07-01	0.03034
2013-10-01	0.10076
2014-01-01	0.06930
2014-04-01	0.18256
2014-07-01	0.99350
2015-01-01	0.40381
2015-04-01	0.08155