Quarter	Billions of US Dollars
1966-07-01	0.0150
1967-01-01	0.0138
1972-04-01	0.0325
1972-07-01	0.0213
1972-10-01	0.0448
1973-01-01	0.0366
1973-04-01	0.0506
1973-07-01	0.0358
1973-10-01	0.0600
1974-01-01	0.0518
1974-04-01	0.0486
1974-07-01	0.1671
1974-10-01	0.2958
1975-01-01	0.3976
1975-04-01	0.4933
1975-07-01	0.1394
1975-10-01	0.0188
1976-01-01	0.1003
1976-04-01	0.0644
1976-07-01	0.1446
1976-10-01	0.3270
1977-01-01	0.3424
1977-04-01	0.2853
1977-07-01	0.3808
1977-10-01	0.2354
1978-01-01	0.2671
1978-04-01	0.3596
1978-07-01	0.3417
1978-10-01	0.3124
1979-01-01	0.3059
1979-04-01	0.1853
1979-07-01	0.2886
1979-10-01	0.0769
1980-01-01	0.2299
1980-04-01	0.3686
1980-07-01	0.4889
1980-10-01	0.3361
1981-01-01	0.2966
1981-04-01	0.3920
1981-07-01	0.2001
1981-10-01	0.4128
1982-01-01	0.4653
1982-04-01	0.2595
1982-07-01	0.1269
1982-10-01	0.0892
1983-01-01	0.1880
1983-04-01	0.2623
1983-07-01	0.1951
1983-10-01	-0.0814
1984-01-01	0.3047
1984-04-01	0.3235
1984-07-01	0.1537
1984-10-01	0.1882
1985-01-01	0.2184
1985-04-01	0.4088
1985-07-01	0.3291
1985-10-01	-0.1100
1986-01-01	0.6931
1986-04-01	0.8854
1986-07-01	0.4897
1986-10-01	0.1428
1987-01-01	0.8609
1987-04-01	0.5104
1987-07-01	0.0013
1987-10-01	0.8236
1988-01-01	2.0413
1988-04-01	0.5680
1988-07-01	0.5113
1988-10-01	0.1613
1989-01-01	0.7813
1989-04-01	0.5859
1989-07-01	0.1007
1989-10-01	0.8145
1990-01-01	1.0076
1990-04-01	0.8879
1990-07-01	0.5950
1990-10-01	0.5792
1991-01-01	1.5202
1991-04-01	-0.0725
1991-07-01	0.6517
1991-10-01	1.0443
1992-01-01	1.1823
1992-04-01	1.2118
1992-07-01	0.7235
1992-10-01	0.1393
1993-01-01	0.8780
1993-04-01	1.1709
1993-07-01	1.1290
1993-10-01	1.3353
1994-01-01	2.0938
1994-04-01	0.1085
1994-07-01	0.0525
1994-10-01	2.3358
1995-01-01	4.0060
1995-04-01	0.6033
1995-07-01	0.2176
1995-10-01	1.1912
1996-01-01	2.6610
1996-04-01	1.4952
1996-07-01	0.3867
1996-10-01	-0.3534
1997-01-01	1.9565
1997-04-01	0.8025
1997-07-01	1.6212
1997-10-01	-0.8928
1998-01-01	2.7487
1998-04-01	1.6359
1998-07-01	1.0155
1998-10-01	3.1927
1999-01-01	4.8675
1999-04-01	3.5215
1999-07-01	-1.5720
1999-10-01	0.9898
2000-01-01	2.8625
2000-04-01	2.7682
2000-07-01	3.1865
2000-10-01	0.1453
2001-01-01	4.8500
2001-04-01	1.1546
2001-07-01	2.0509
2001-10-01	5.7893
2002-01-01	9.6314
2002-04-01	3.3757
2002-07-01	1.4062
2002-10-01	1.6791
2003-01-01	4.0803
2003-04-01	11.5193
2003-07-01	5.9700
2003-10-01	2.9009
2004-01-01	10.8238
2004-04-01	4.6344
2004-07-01	2.0687
2004-10-01	1.5694
2005-01-01	15.3349
2005-04-01	11.7324
2005-07-01	-0.7021
2005-10-01	5.4968
2006-01-01	5.4211
2006-04-01	11.2728
2006-07-01	5.6977
2006-10-01	14.0570
2007-01-01	25.1089
2007-04-01	4.4914
2007-07-01	5.2723
2007-10-01	5.7186
2008-01-01	7.0685
2008-04-01	-1.0833
2008-07-01	-1.0880
2008-10-01	5.1915
2009-01-01	8.3812
2009-04-01	8.6873
2009-07-01	5.3827
2009-10-01	-3.9669
2010-01-01	1.0702
2010-04-01	-2.7237
2010-07-01	-0.5928
2010-10-01	-3.7389
2011-01-01	-1.7900
2011-04-01	-4.5232
2011-07-01	1.3277
2011-10-01	-5.0996
2012-01-01	-9.8742
2012-04-01	-0.8375
2012-07-01	0.4633
2012-10-01	-3.2718
2013-01-01	-5.8474
2013-04-01	7.1229
2013-07-01	-0.6674
2013-10-01	-5.1142
2014-01-01	-17.7954
2014-04-01	0.6306
2014-07-01	-5.9656
2014-10-01	5.9221
2015-01-01	-2.0486
2015-04-01	-2.2713