Quarter	Billions of US Dollars
1972-07-01	0.05000
1975-04-01	0.04050
1976-01-01	0.02500
1977-01-01	0.03000
1977-07-01	0.10000
1977-10-01	0.04460
1980-04-01	0.05000
1984-10-01	0.04020
1985-01-01	0.16960
1985-07-01	0.25250
1986-01-01	0.41230
1986-07-01	0.07250
1986-10-01	0.05500
1987-01-01	0.27390
1987-07-01	0.28310
1988-01-01	0.31470
1988-04-01	0.11600
1988-07-01	0.32960
1988-10-01	0.04890
1989-01-01	0.38530
1989-04-01	0.10220
1989-07-01	0.26340
1989-10-01	0.10510
1990-01-01	0.25900
1990-04-01	0.11960
1990-07-01	0.32760
1990-10-01	0.23640
1991-01-01	0.12850
1991-04-01	0.18990
1991-07-01	0.68660
1991-10-01	0.23080
1992-01-01	0.61170
1992-04-01	0.05160
1992-07-01	0.20000
1992-10-01	0.63230
1993-01-01	1.35120
1993-04-01	0.21770
1993-07-01	1.19460
1993-10-01	1.87860
1994-01-01	0.05780
1994-04-01	0.16360
1994-07-01	0.66860
1994-10-01	0.69520
1995-01-01	0.25250
1995-04-01	1.01040
1995-07-01	0.91470
1995-10-01	0.62500
1996-04-01	0.33251
1997-01-01	0.41428
1998-01-01	0.71305
1998-07-01	0.08248
1998-10-01	0.80128
1999-01-01	0.57910
1999-04-01	1.27284
1999-07-01	0.13083
1999-10-01	0.53220
2000-01-01	0.20578
2000-10-01	0.33500
2001-04-01	1.24778
2003-01-01	1.08131
2003-07-01	1.13007
2004-01-01	1.23946
2004-04-01	1.35042
2004-07-01	0.90878
2004-10-01	1.42760
2005-01-01	2.95097
2005-04-01	1.73841
2005-07-01	1.51480
2005-10-01	0.95726
2006-01-01	4.21712
2006-04-01	0.17452
2006-07-01	2.24578
2006-10-01	2.05544
2007-01-01	2.71004
2007-04-01	1.11945
2007-10-01	0.21425
2008-01-01	1.57204
2008-04-01	3.83861
2008-07-01	0.32728
2009-04-01	0.06801
2009-07-01	2.59910
2009-10-01	1.55135
2010-01-01	2.51250
2010-04-01	1.40163
2011-01-01	3.83819
2011-04-01	2.79377
2011-07-01	1.43633
2011-10-01	2.07178
2012-01-01	0.03300
2012-04-01	0.15000
2012-07-01	1.13795
2012-10-01	1.19927
2013-01-01	3.25000
2013-04-01	0.45979
2013-07-01	0.52367
2013-10-01	5.94439
2014-01-01	3.21000
2014-04-01	0.01915
2014-07-01	1.01220
2014-10-01	0.88418
2015-01-01	0.57771
2015-04-01	6.18538