Quarter	Billions of US Dollars
1968-07-01	0.04000
1973-10-01	0.00250
1974-01-01	0.05000
1975-01-01	0.01980
1980-04-01	0.03000
1981-04-01	0.02000
1981-10-01	0.13640
1982-04-01	0.03000
1984-04-01	0.00110
1984-07-01	0.02070
1984-10-01	0.04040
1985-01-01	0.15000
1985-04-01	0.07860
1985-07-01	0.02060
1985-10-01	0.18563
1986-01-01	0.29420
1986-04-01	0.00010
1986-10-01	0.04480
1987-01-01	0.41470
1987-07-01	0.05830
1987-10-01	0.11252
1988-01-01	0.07390
1988-04-01	0.20320
1988-07-01	0.33720
1988-10-01	0.01079
1989-04-01	0.25040
1989-10-01	0.33790
1990-01-01	0.10108
1990-07-01	0.14890
1990-10-01	0.23020
1991-01-01	0.15150
1991-04-01	-0.03615
1991-07-01	0.29355
1991-10-01	-0.00600
1992-01-01	-0.33525
1992-04-01	-0.05078
1992-10-01	-0.19428
1993-01-01	-0.40102
1993-04-01	-0.13629
1993-07-01	-0.02441
1993-10-01	0.26319
1994-01-01	0.07359
1994-04-01	0.27920
1994-07-01	0.35980
1994-10-01	-0.43079
1995-04-01	-0.10744
1995-07-01	0.20459
1995-10-01	0.01832
1996-01-01	0.32000
1996-04-01	0.07353
1996-07-01	0.34986
1996-10-01	0.25152
1997-01-01	0.29443
1997-04-01	0.43600
1997-07-01	0.91292
1997-10-01	0.08034
1998-01-01	0.34754
1998-04-01	0.22326
1998-07-01	-0.20786
1999-01-01	0.04986
1999-04-01	-0.40037
1999-07-01	-0.19860
1999-10-01	-0.40482
2000-01-01	0.28095
2000-04-01	-0.11000
2000-07-01	-0.56401
2001-01-01	-0.19007
2001-04-01	-0.23304
2001-07-01	-0.15598
2002-01-01	0.12008
2002-04-01	0.10000
2002-07-01	-0.39241
2002-10-01	-0.51041
2003-01-01	-0.22000
2003-07-01	0.09998
2003-10-01	0.09916
2004-01-01	0.79805
2004-04-01	0.50000
2004-07-01	1.30242
2004-10-01	1.87938
2005-01-01	2.41807
2005-04-01	0.50000
2005-07-01	1.19766
2005-10-01	1.58152
2006-01-01	3.47216
2006-04-01	2.22404
2006-07-01	1.17946
2006-10-01	2.36191
2007-01-01	6.27515
2007-04-01	3.64043
2007-07-01	0.48386
2007-10-01	3.26311
2008-01-01	0.42559
2008-04-01	0.25145
2008-07-01	1.20084
2008-10-01	0.61786
2009-01-01	-1.69456
2009-04-01	0.46302
2009-07-01	0.27175
2009-10-01	3.05282
2010-01-01	-0.98647
2010-04-01	-0.49059
2010-07-01	-0.33410
2010-10-01	2.61227
2011-01-01	1.78757
2011-04-01	5.09289
2011-07-01	1.48932
2011-10-01	-2.38466
2012-01-01	2.10459
2012-04-01	-1.78325
2012-07-01	1.17703
2012-10-01	1.83980
2013-01-01	3.76121
2013-04-01	8.08491
2013-07-01	1.66180
2013-10-01	3.50185
2014-01-01	2.67932
2014-04-01	5.02987
2014-07-01	7.32969
2014-10-01	1.28882
2015-01-01	0.91346
2015-04-01	3.42085