Quarter	Billions of US Dollars
1973-10-01	0.00250
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
1985-07-01	0.02060
1985-10-01	0.16656
1986-01-01	0.29420
1986-04-01	0.00010
1986-10-01	0.04480
1987-01-01	0.15260
1987-10-01	0.11252
1988-04-01	0.20320
1988-07-01	0.34120
1988-10-01	0.01212
1989-04-01	0.25040
1989-10-01	0.33790
1990-01-01	0.12500
1990-07-01	0.14890
1990-10-01	0.23020
1991-01-01	0.15150
1991-04-01	-0.03615
1991-07-01	-0.03645
1991-10-01	-0.00600
1992-01-01	-0.15000
1992-10-01	-0.18131
1993-01-01	-0.40102
1993-04-01	-0.13629
1993-07-01	0.06500
1993-10-01	0.26500
1994-01-01	0.17680
1994-04-01	0.13500
1994-07-01	0.35980
1994-10-01	-0.43079
1995-07-01	0.20459
1995-10-01	0.13072
1996-01-01	0.32000
1996-04-01	0.07353
1996-07-01	0.45000
1996-10-01	0.13376
1997-01-01	0.29443
1997-04-01	0.43600
1997-07-01	0.91292
1997-10-01	0.08034
1998-04-01	-0.11372
1998-07-01	-0.20786
1999-01-01	0.04986
1999-04-01	-0.40037
1999-07-01	-0.22420
1999-10-01	-0.40482
2000-01-01	-0.30837
2000-04-01	-0.11000
2001-01-01	-0.19007
2001-04-01	-0.10930
2001-07-01	-0.15000
2002-01-01	-0.15000
2002-04-01	0.10000
2002-07-01	-0.39241
2002-10-01	-0.07238
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	0.27259
2004-10-01	0.84850
2005-01-01	0.75207
2005-04-01	0.50000
2005-07-01	1.19766
2005-10-01	0.67152
2006-01-01	2.73316
2006-04-01	2.23967
2006-07-01	0.78946
2006-10-01	1.36591
2007-01-01	4.72025
2007-04-01	2.12087
2007-07-01	1.60927
2007-10-01	3.02369
2008-01-01	0.33069
2008-04-01	0.15859
2008-07-01	-0.09916
2008-10-01	0.61786
2009-01-01	-0.68718
2009-04-01	-0.78698
2009-07-01	0.57175
2009-10-01	2.20282
2010-01-01	-0.26247
2010-04-01	-0.16188
2010-07-01	-1.23410
2010-10-01	-0.58253
2011-01-01	-0.93301
2011-04-01	-1.24627
2011-07-01	1.28932
2011-10-01	-1.50966
2012-01-01	-2.99632
2012-04-01	-2.15746
2012-07-01	-1.45565
2012-10-01	0.04066
2013-01-01	1.16991
2013-04-01	1.34173
2013-07-01	1.00000
2014-01-01	0.62407
2014-04-01	1.93200
2014-07-01	3.19649
2014-10-01	-0.25693
2015-01-01	1.03875
2015-04-01	2.48833