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	-0.01371
1983-01-01	0.05678
1983-04-01	0.02290
1983-10-01	0.02160
1984-04-01	-0.01113
1985-07-01	0.12500
1985-10-01	0.03938
1986-01-01	-0.00105
1986-04-01	0.04750
1986-07-01	-0.00633
1986-10-01	-0.02087
1987-01-01	0.05160
1987-04-01	-0.00898
1987-07-01	-0.00651
1987-10-01	-0.01800
1988-01-01	-0.02008
1988-04-01	-0.00018
1988-07-01	-0.00400
1988-10-01	-0.01014
1989-01-01	0.07153
1989-04-01	0.09100
1989-10-01	-0.01649
1990-01-01	-0.03397
1990-10-01	-0.00800
1991-01-01	-0.00019
1991-04-01	0.12997
1991-10-01	-0.00800
1992-01-01	0.10860
1992-04-01	-0.06160
1992-07-01	0.07380
1992-10-01	-0.01750
1993-01-01	0.03368
1993-04-01	0.19100
1993-07-01	-0.00562
1993-10-01	-0.01264
1994-01-01	0.24700
1994-04-01	-0.16000
1994-07-01	0.05060
1994-10-01	0.12100
1995-01-01	0.16160
1995-10-01	-0.01600
1996-04-01	0.08765
1996-07-01	0.06544
1996-10-01	0.03000
1997-01-01	0.01376
1997-04-01	-0.04182
1998-01-01	0.07500
1998-07-01	-0.08162
1998-10-01	0.02500
1999-01-01	0.01846
1999-04-01	0.24407
1999-07-01	0.11394
1999-10-01	0.03616
2000-01-01	0.35427
2000-04-01	0.25442
2000-07-01	0.14938
2000-10-01	0.45655
2001-01-01	0.13731
2001-04-01	0.10861
2001-07-01	-0.03638
2001-10-01	0.37493
2002-01-01	0.23648
2002-04-01	0.56171
2002-07-01	0.06427
2002-10-01	-0.43085
2003-01-01	0.04840
2003-04-01	0.56128
2003-07-01	0.92659
2003-10-01	1.16691
2004-01-01	1.92108
2004-04-01	0.85126
2004-07-01	3.57397
2004-10-01	3.29895
2005-01-01	3.85037
2005-04-01	4.34842
2005-07-01	3.84073
2005-10-01	3.68995
2006-01-01	2.47738
2006-04-01	1.58274
2006-07-01	2.57437
2006-10-01	4.92653
2007-01-01	1.58320
2007-04-01	1.53670
2007-07-01	-0.39069
2007-10-01	1.36779
2008-01-01	1.65242
2008-04-01	2.89488
2008-07-01	-0.71063
2008-10-01	-1.45743
2009-01-01	-2.75516
2009-04-01	-2.86330
2009-07-01	-1.83532
2009-10-01	-3.11122
2010-01-01	-3.30212
2010-04-01	-2.25676
2010-07-01	-0.20844
2010-10-01	-2.59081
2011-01-01	-1.17133
2011-04-01	-0.03197
2011-07-01	-2.07896
2011-10-01	-3.55039
2012-01-01	-2.20119
2012-04-01	-1.12177
2012-07-01	-1.98105
2012-10-01	-0.60047
2013-01-01	-0.16235
2013-04-01	-0.13234
2013-07-01	-0.29547
2013-10-01	-0.22044
2014-01-01	-0.15856
2014-04-01	-0.31781
2014-07-01	0.91444
2014-10-01	-0.31229
2015-01-01	-0.13720
2015-04-01	-0.27218