Quarter	Billions of US Dollars
1967-04-01	0.0200
1971-01-01	0.0306
1971-10-01	0.0456
1972-01-01	0.0309
1972-07-01	0.0310
1972-10-01	0.0662
1973-01-01	0.0313
1973-04-01	0.0166
1974-07-01	0.0253
1975-01-01	0.0209
1975-04-01	0.0175
1975-07-01	0.0250
1976-01-01	0.0099
1976-04-01	0.0670
1976-07-01	0.0277
1976-10-01	0.1424
1977-01-01	0.2037
1977-04-01	0.1896
1977-07-01	0.0219
1977-10-01	0.0863
1978-04-01	0.2272
1978-07-01	0.0222
1979-01-01	0.2091
1979-04-01	0.1359
1979-07-01	0.0579
1979-10-01	0.0376
1980-01-01	0.1013
1980-04-01	0.1180
1980-07-01	0.0561
1980-10-01	0.0687
1981-01-01	-0.0132
1981-04-01	0.1288
1981-10-01	0.0643
1982-01-01	0.1950
1982-04-01	0.2584
1982-10-01	0.0218
1983-01-01	0.2285
1983-04-01	0.1226
1983-07-01	0.1464
1983-10-01	0.3414
1984-01-01	0.4933
1984-04-01	-0.2245
1984-07-01	0.0554
1984-10-01	0.6682
1985-01-01	0.4761
1985-04-01	0.3656
1985-07-01	0.0487
1985-10-01	-0.1707
1986-01-01	-0.2834
1986-04-01	-0.0371
1986-07-01	-0.0437
1986-10-01	-0.3884
1987-01-01	-0.3128
1987-04-01	-0.5099
1987-07-01	0.2839
1987-10-01	-0.0622
1988-01-01	0.1611
1988-04-01	-0.2569
1988-07-01	0.0332
1988-10-01	0.2898
1989-01-01	-0.0288
1989-04-01	-0.0589
1989-07-01	-0.2639
1989-10-01	-0.1451
1990-01-01	-0.1347
1990-04-01	0.3890
1990-07-01	0.3435
1990-10-01	0.9172
1991-01-01	-0.1409
1991-04-01	0.2992
1991-07-01	-0.0040
1991-10-01	0.9251
1992-01-01	0.9690
1992-04-01	1.1288
1992-07-01	1.6944
1992-10-01	0.0574
1993-01-01	2.3402
1993-04-01	1.1712
1993-07-01	0.1225
1993-10-01	0.1919
1994-01-01	-0.3304
1994-04-01	-0.0076
1994-07-01	1.5343
1994-10-01	-0.0653
1995-01-01	3.4981
1995-04-01	-0.3750
1995-07-01	-0.0434
1995-10-01	-0.2228
1996-01-01	0.1006
1996-04-01	-0.0940
1996-07-01	2.6567
1996-10-01	0.7594
1997-01-01	1.4723
1997-04-01	0.8926
1997-07-01	1.6546
1997-10-01	1.0049
1998-01-01	1.1091
1998-04-01	1.8251
1998-07-01	1.7455
1998-10-01	0.8544
1999-01-01	1.0885
1999-04-01	3.7052
1999-07-01	1.3911
1999-10-01	3.1553
2000-01-01	-0.5245
2000-04-01	2.1921
2000-07-01	2.4875
2000-10-01	0.8729
2001-01-01	0.8489
2001-04-01	4.5466
2001-07-01	1.2856
2001-10-01	4.2651
2002-01-01	5.9318
2002-04-01	3.7050
2002-07-01	2.9584
2002-10-01	7.8476
2003-01-01	10.3326
2003-04-01	16.3077
2003-07-01	7.5949
2003-10-01	16.2845
2004-01-01	12.6407
2004-04-01	11.4051
2004-07-01	1.3180
2004-10-01	17.9526
2005-01-01	18.0828
2005-04-01	35.4739
2005-07-01	8.2487
2005-10-01	48.8463
2006-01-01	61.7927
2006-04-01	46.9367
2006-07-01	22.7327
2006-10-01	29.2644
2007-01-01	49.5787
2007-04-01	42.0634
2007-07-01	19.1824
2007-10-01	3.4970
2008-01-01	4.2851
2008-04-01	46.1428
2008-07-01	10.7068
2008-10-01	19.3162
2009-01-01	20.4349
2009-04-01	18.9818
2009-07-01	31.0621
2009-10-01	17.4347
2010-01-01	5.4842
2010-04-01	-7.2404
2010-07-01	28.1153
2010-10-01	3.3228
2011-01-01	12.7901
2011-04-01	-4.1413
2011-07-01	6.8237
2011-10-01	5.0796
2012-01-01	28.5275
2012-04-01	-29.6116
2012-07-01	-19.8855
2012-10-01	15.2201
2013-01-01	-7.6231
2013-04-01	-13.1522
2013-07-01	-25.6920
2013-10-01	2.8453
2014-01-01	-28.1907
2014-04-01	2.6088
2014-07-01	-16.8664
2014-10-01	-18.4347
2015-01-01	-8.8947
2015-04-01	-7.8579