Quarter	Billions of US Dollars
1972-01-01	0.04900
1972-04-01	0.07780
1972-07-01	0.02970
1972-10-01	0.08580
1973-04-01	0.13550
1973-07-01	0.03780
1973-10-01	0.29490
1974-01-01	0.09370
1974-04-01	0.36320
1974-07-01	0.03040
1974-10-01	0.07240
1975-01-01	0.06400
1975-04-01	0.05750
1975-07-01	0.04550
1976-01-01	0.06080
1976-04-01	0.05590
1976-07-01	0.06690
1976-10-01	0.16690
1977-01-01	0.11710
1977-04-01	0.05170
1977-07-01	0.10340
1977-10-01	0.06780
1978-01-01	0.06450
1978-04-01	0.12860
1978-07-01	0.06240
1978-10-01	0.17000
1979-01-01	0.11000
1979-04-01	0.07500
1979-10-01	0.01500
1980-04-01	0.05000
1980-07-01	0.04000
1980-10-01	0.04000
1981-01-01	0.00700
1981-04-01	0.01500
1981-07-01	0.11000
1982-04-01	0.12500
1983-04-01	0.07500
1983-07-01	0.06000
1985-10-01	0.01200
1986-07-01	0.10500
1987-01-01	0.02000
1987-07-01	0.01500
1991-01-01	0.94900
1993-07-01	0.05000
1995-10-01	0.20000
1996-10-01	0.80000
1997-04-01	0.07500
1997-07-01	0.28813
1997-10-01	0.90000
1998-04-01	0.19646
1998-07-01	0.42167
1998-10-01	0.50000
1999-01-01	0.80000
1999-04-01	0.42269
1999-07-01	0.06000
1999-10-01	0.76315
2000-01-01	1.15426
2000-04-01	0.07000
2000-07-01	0.44635
2000-10-01	0.10003
2001-01-01	0.26231
2001-04-01	0.70002
2001-07-01	0.36000
2001-10-01	0.35017
2002-01-01	0.59572
2002-04-01	0.05989
2002-07-01	0.14559
2002-10-01	0.65006
2003-01-01	0.20060
2003-04-01	0.95098
2003-07-01	0.22525
2003-10-01	0.78832
2004-01-01	1.50492
2004-04-01	1.08446
2004-07-01	0.01740
2004-10-01	0.97504
2005-01-01	0.12981
2005-04-01	0.00519
2005-07-01	0.00245
2005-10-01	0.99439
2006-01-01	1.41357
2006-04-01	0.06025
2006-07-01	0.00423
2006-10-01	1.00353
2007-01-01	0.02779
2007-04-01	0.19857
2007-07-01	0.00012
2007-10-01	0.10012
2008-01-01	0.25010
2008-04-01	2.05319
2008-07-01	0.10873
2008-10-01	0.00123
2009-01-01	2.14554
2009-04-01	0.15900
2009-07-01	0.12694
2009-10-01	0.02193
2010-01-01	2.09323
2010-04-01	1.77895
2010-07-01	0.00213
2010-10-01	0.10748
2011-01-01	0.32900
2011-04-01	0.06772
2011-07-01	0.12056
2011-10-01	5.07556
2012-01-01	3.50234
2012-04-01	0.07639
2012-07-01	0.01270
2012-10-01	4.98383
2013-01-01	2.10021
2013-04-01	1.59127
2013-07-01	0.68694
2013-10-01	1.72772
2014-01-01	2.08414
2014-04-01	1.61020
2014-07-01	0.02505
2014-10-01	3.36012
2015-01-01	5.17685
2015-04-01	0.00867