Quarter	Billions of US Dollars
1966-01-01	0.0200
1967-10-01	0.0150
1971-01-01	0.0450
1971-04-01	0.0229
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	0.0732
1973-04-01	0.0388
1973-10-01	0.0458
1974-01-01	0.0220
1974-04-01	0.0500
1974-07-01	0.0100
1974-10-01	0.0728
1975-01-01	0.3236
1975-04-01	0.3761
1975-07-01	0.0786
1975-10-01	0.3347
1976-01-01	0.3118
1976-04-01	0.1625
1976-07-01	0.2690
1976-10-01	0.4393
1977-01-01	0.3397
1977-04-01	0.3741
1977-07-01	0.3207
1977-10-01	0.4338
1978-01-01	0.1336
1978-04-01	0.4397
1978-07-01	0.0359
1978-10-01	0.0755
1979-01-01	0.2558
1979-04-01	0.8264
1979-07-01	0.0510
1979-10-01	0.3889
1980-01-01	0.5526
1980-04-01	0.8950
1980-07-01	0.6758
1980-10-01	0.5930
1981-01-01	0.5094
1981-04-01	0.2775
1981-07-01	0.1639
1981-10-01	0.4248
1982-01-01	1.1281
1982-04-01	0.0485
1982-07-01	0.3396
1982-10-01	0.5650
1983-01-01	1.8526
1983-04-01	-0.3849
1983-07-01	0.0287
1983-10-01	1.1229
1984-01-01	0.6787
1984-04-01	1.9561
1984-07-01	0.8929
1984-10-01	1.6815
1985-01-01	-1.1993
1985-04-01	2.6951
1985-07-01	0.0526
1985-10-01	-1.2588
1986-01-01	0.9236
1986-04-01	0.8580
1986-07-01	0.8404
1986-10-01	-0.2743
1987-01-01	0.7936
1987-04-01	0.2492
1987-07-01	-0.1105
1987-10-01	-0.3828
1988-01-01	1.5286
1988-04-01	0.2469
1988-07-01	0.5796
1988-10-01	0.5433
1989-01-01	1.8861
1989-04-01	0.2703
1989-07-01	0.5179
1989-10-01	2.3186
1990-01-01	1.3283
1990-04-01	-0.7046
1990-07-01	0.5512
1990-10-01	-0.1883
1991-01-01	-0.0644
1991-04-01	0.8277
1991-07-01	0.2322
1991-10-01	-1.1609
1992-01-01	-0.1711
1992-04-01	1.6508
1992-07-01	1.0588
1992-10-01	1.1922
1993-01-01	3.7873
1993-04-01	-0.4316
1993-07-01	2.1763
1993-10-01	4.1288
1994-01-01	4.5017
1994-04-01	7.3964
1994-07-01	4.1998
1994-10-01	0.9831
1995-01-01	1.1962
1995-04-01	1.2236
1995-07-01	4.1241
1995-10-01	-0.4647
1996-01-01	3.4934
1996-04-01	0.6186
1996-07-01	4.5913
1996-10-01	-0.4329
1997-01-01	1.8943
1997-04-01	-0.0070
1997-07-01	0.6894
1997-10-01	-2.1384
1998-01-01	-3.5801
1998-04-01	1.2089
1998-07-01	-2.5015
1998-10-01	-4.5191
1999-01-01	-5.1251
1999-04-01	3.1140
1999-07-01	-0.3125
1999-10-01	1.8522
2000-01-01	0.7545
2000-04-01	0.3785
2000-07-01	-1.9470
2000-10-01	-1.8801
2001-01-01	1.8693
2001-04-01	3.3459
2001-07-01	-0.7221
2001-10-01	2.8462
2002-01-01	-0.0087
2002-04-01	4.4495
2002-07-01	0.2203
2002-10-01	0.2924
2003-01-01	1.1557
2003-04-01	3.8762
2003-07-01	0.2566
2003-10-01	2.6598
2004-01-01	3.2391
2004-04-01	0.2423
2004-07-01	1.6381
2004-10-01	2.0539
2005-01-01	5.3458
2005-04-01	7.9013
2005-07-01	4.0790
2005-10-01	1.2968
2006-01-01	10.9206
2006-04-01	2.0355
2006-07-01	0.5759
2006-10-01	9.8934
2007-01-01	13.1372
2007-04-01	18.2135
2007-07-01	-1.5723
2007-10-01	2.8182
2008-01-01	-4.5316
2008-04-01	19.6904
2008-07-01	10.4084
2008-10-01	-0.5354
2009-01-01	20.9809
2009-04-01	28.2142
2009-07-01	18.8022
2009-10-01	12.8660
2010-01-01	23.1901
2010-04-01	-6.6154
2010-07-01	4.6107
2010-10-01	6.3484
2011-01-01	8.8428
2011-04-01	12.3156
2011-07-01	0.9550
2011-10-01	-2.7285
2012-01-01	18.3568
2012-04-01	14.5120
2012-07-01	9.2537
2012-10-01	14.6076
2013-01-01	14.0929
2013-04-01	12.3957
2013-07-01	11.4986
2013-10-01	1.1391
2014-01-01	3.7062
2014-04-01	-1.7833
2014-07-01	6.1166
2014-10-01	4.4534
2015-01-01	10.1053
2015-04-01	4.6395