Quarter	Billions of US Dollars
1974-10-01	0.0189
1976-04-01	0.0100
1976-07-01	0.0241
1976-10-01	0.0401
1977-01-01	0.0250
1977-10-01	0.0465
1978-01-01	0.0415
1978-04-01	0.0145
1979-01-01	0.0436
1979-07-01	-0.0254
1980-10-01	0.0473
1981-07-01	0.0731
1981-10-01	-0.0413
1982-01-01	0.0156
1983-04-01	0.0063
1983-07-01	0.0702
1983-10-01	0.0716
1984-01-01	0.0435
1984-04-01	0.1148
1984-07-01	0.1899
1984-10-01	0.3622
1985-01-01	0.1000
1985-04-01	0.4266
1985-07-01	0.3426
1985-10-01	0.4496
1986-01-01	0.3587
1986-04-01	0.2043
1986-07-01	0.0200
1986-10-01	0.1250
1987-01-01	0.0250
1987-04-01	0.0258
1987-07-01	0.2050
1987-10-01	0.0500
1988-01-01	-0.4276
1988-04-01	-0.0450
1988-07-01	0.0800
1988-10-01	0.0600
1989-01-01	-0.1095
1989-04-01	-0.0950
1989-07-01	-0.0361
1989-10-01	0.1656
1990-01-01	0.2480
1990-04-01	-0.2235
1990-07-01	0.0580
1990-10-01	-0.1330
1991-01-01	0.6562
1991-04-01	1.2873
1991-07-01	0.2700
1991-10-01	0.5121
1992-01-01	0.7058
1992-04-01	0.2435
1992-07-01	1.0904
1992-10-01	0.9008
1993-01-01	0.6492
1993-04-01	0.7768
1993-07-01	0.5621
1993-10-01	2.5073
1994-01-01	0.7999
1994-04-01	1.4617
1994-07-01	1.3721
1994-10-01	0.2817
1995-01-01	1.4904
1995-04-01	2.0727
1995-07-01	1.5354
1995-10-01	0.8490
1996-01-01	2.4099
1996-04-01	3.5164
1996-07-01	3.7942
1996-10-01	4.1572
1997-01-01	3.3391
1997-04-01	2.9101
1997-07-01	5.0895
1997-10-01	1.8879
1998-01-01	-0.7914
1998-04-01	3.6331
1998-07-01	-0.9260
1998-10-01	-0.7784
1999-01-01	-0.9555
1999-04-01	-1.0853
1999-07-01	-1.6382
1999-10-01	0.1832
2000-01-01	1.3839
2000-04-01	-0.5611
2000-07-01	-0.4039
2000-10-01	-0.0498
2001-01-01	-0.5142
2001-04-01	-0.6637
2001-07-01	-0.7396
2001-10-01	1.2103
2002-01-01	-1.5746
2002-04-01	1.2235
2002-07-01	2.6296
2002-10-01	2.6438
2003-01-01	0.3806
2003-04-01	2.7248
2003-07-01	3.1773
2003-10-01	0.6887
2004-01-01	3.1689
2004-04-01	3.1825
2004-07-01	1.8122
2004-10-01	0.8799
2005-01-01	2.5301
2005-04-01	1.2713
2005-07-01	1.3971
2005-10-01	5.0959
2006-01-01	1.5555
2006-04-01	4.1364
2006-07-01	3.9221
2006-10-01	3.2143
2007-01-01	0.4980
2007-04-01	8.3266
2007-07-01	-0.6432
2007-10-01	1.6163
2008-01-01	1.2013
2008-04-01	1.7688
2008-07-01	-1.8482
2008-10-01	-2.8412
2009-01-01	2.5434
2009-04-01	8.8771
2009-07-01	5.4136
2009-10-01	-2.4397
2010-01-01	0.7995
2010-04-01	1.0980
2010-07-01	4.1450
2010-10-01	4.2409
2011-01-01	5.3777
2011-04-01	2.8733
2011-07-01	4.7357
2011-10-01	4.2977
2012-01-01	5.9642
2012-04-01	1.9040
2012-07-01	8.0037
2012-10-01	-1.8532
2013-01-01	3.7581
2013-04-01	-5.2489
2013-07-01	11.6000
2013-10-01	8.2687
2014-01-01	3.3750
2014-04-01	-0.6424
2014-07-01	-0.7422
2014-10-01	6.0449
2015-01-01	-2.1534
2015-04-01	2.5444