Quarter	Billions of US Dollars
1966-01-01	0.0200
1967-10-01	0.0150
1971-01-01	0.0150
1971-07-01	0.0150
1972-01-01	0.1197
1972-04-01	0.0300
1972-07-01	0.0250
1972-10-01	0.0661
1973-01-01	0.0812
1973-04-01	0.0388
1973-10-01	0.0458
1974-01-01	0.0220
1974-04-01	0.0500
1974-10-01	0.0728
1975-01-01	0.3075
1975-04-01	0.3468
1975-07-01	0.0786
1975-10-01	0.3045
1976-01-01	0.2753
1976-04-01	0.1625
1976-07-01	0.2690
1976-10-01	0.3865
1977-01-01	0.3406
1977-04-01	0.4041
1977-07-01	0.3507
1977-10-01	0.4338
1978-01-01	0.0809
1978-04-01	0.4397
1978-07-01	0.0359
1978-10-01	0.1189
1979-01-01	0.2558
1979-04-01	0.8014
1979-07-01	0.0548
1979-10-01	0.3889
1980-01-01	0.6037
1980-04-01	0.9395
1980-07-01	0.6758
1980-10-01	0.6394
1981-01-01	0.5763
1981-04-01	0.2775
1981-07-01	0.1639
1981-10-01	0.4248
1982-01-01	1.2281
1982-04-01	0.1235
1982-07-01	0.3055
1982-10-01	0.5701
1983-01-01	1.8431
1983-04-01	-0.4149
1983-07-01	0.0551
1983-10-01	1.1474
1984-01-01	0.7487
1984-04-01	1.9561
1984-07-01	1.0090
1984-10-01	1.9011
1985-01-01	-1.2175
1985-04-01	3.0038
1985-07-01	0.2889
1985-10-01	-1.0140
1986-01-01	0.9982
1986-04-01	0.9588
1986-07-01	1.5102
1986-10-01	0.1430
1987-01-01	1.6493
1987-04-01	0.2725
1987-07-01	-0.0036
1987-10-01	-0.2738
1988-01-01	1.6014
1988-04-01	0.4787
1988-07-01	0.7334
1988-10-01	1.1939
1989-01-01	2.7824
1989-04-01	0.9294
1989-07-01	1.1265
1989-10-01	3.0450
1990-01-01	1.4953
1990-04-01	-0.1079
1990-07-01	0.9803
1990-10-01	0.1277
1991-01-01	0.0828
1991-04-01	1.7091
1991-07-01	0.1507
1991-10-01	-1.7011
1992-01-01	-1.0794
1992-04-01	1.8712
1992-07-01	1.3460
1992-10-01	0.7332
1993-01-01	3.1739
1993-04-01	-1.0244
1993-07-01	2.3197
1993-10-01	3.7779
1994-01-01	4.4497
1994-04-01	6.8833
1994-07-01	3.8780
1994-10-01	1.1079
1995-01-01	1.0177
1995-04-01	0.9605
1995-07-01	4.1741
1995-10-01	-0.3016
1996-01-01	2.7116
1996-04-01	0.3595
1996-07-01	4.4096
1996-10-01	-0.7597
1997-01-01	1.5565
1997-04-01	-0.6467
1997-07-01	0.9660
1997-10-01	-2.3682
1998-01-01	-3.6413
1998-04-01	1.7931
1998-07-01	-2.3981
1998-10-01	-4.8483
1999-01-01	-5.3225
1999-04-01	3.6942
1999-07-01	0.6345
1999-10-01	1.8577
2000-01-01	2.2952
2000-04-01	1.1279
2000-07-01	-2.4221
2000-10-01	-1.1604
2001-01-01	1.8770
2001-04-01	3.7702
2001-07-01	-0.9232
2001-10-01	4.0541
2002-01-01	0.6784
2002-04-01	4.9246
2002-07-01	-0.5378
2002-10-01	-0.2544
2003-01-01	2.1232
2003-04-01	2.9137
2003-07-01	2.2157
2003-10-01	4.5557
2004-01-01	5.0432
2004-04-01	0.2688
2004-07-01	1.5174
2004-10-01	2.8170
2005-01-01	3.5896
2005-04-01	10.0380
2005-07-01	5.3396
2005-10-01	-0.8948
2006-01-01	10.1334
2006-04-01	0.6851
2006-07-01	0.4441
2006-10-01	8.1944
2007-01-01	11.5456
2007-04-01	18.5853
2007-07-01	-1.3250
2007-10-01	2.7327
2008-01-01	-3.3577
2008-04-01	19.0077
2008-07-01	9.2463
2008-10-01	-2.0606
2009-01-01	22.0810
2009-04-01	27.3725
2009-07-01	18.8024
2009-10-01	11.0381
2010-01-01	21.2796
2010-04-01	-8.3330
2010-07-01	-0.3890
2010-10-01	7.3717
2011-01-01	15.3912
2011-04-01	19.1781
2011-07-01	4.7159
2011-10-01	-4.4195
2012-01-01	20.0084
2012-04-01	14.4045
2012-07-01	6.3364
2012-10-01	12.3791
2013-01-01	13.7225
2013-04-01	11.5039
2013-07-01	13.9557
2013-10-01	-0.0649
2014-01-01	5.5683
2014-04-01	-9.1855
2014-07-01	6.8728
2014-10-01	4.6007
2015-01-01	11.7269
2015-04-01	3.3254