Quarter	Billions of US Dollars
1966-01-01	0.0150
1966-04-01	0.0200
1971-01-01	0.0120
1971-04-01	0.0153
1972-04-01	0.0577
1972-07-01	0.0158
1973-01-01	0.0307
1973-04-01	0.0200
1973-07-01	0.0162
1974-04-01	0.0500
1975-01-01	0.0243
1975-04-01	0.0170
1975-07-01	0.0485
1976-01-01	0.1080
1976-10-01	0.0826
1977-01-01	0.1464
1977-04-01	0.5476
1977-07-01	0.0330
1978-01-01	0.1169
1978-04-01	0.0310
1978-07-01	0.2870
1979-04-01	0.0991
1979-07-01	0.1046
1980-01-01	0.0366
1980-04-01	0.1120
1980-07-01	0.0126
1980-10-01	0.0557
1981-01-01	-0.0884
1981-04-01	0.0690
1981-07-01	-0.0005
1981-10-01	-0.0255
1982-01-01	0.1817
1982-04-01	-0.1555
1982-07-01	0.0008
1982-10-01	0.0259
1983-01-01	-0.1023
1983-04-01	0.3668
1983-07-01	-0.0644
1983-10-01	0.2579
1984-01-01	-0.1160
1984-04-01	-0.0452
1984-07-01	-0.0676
1984-10-01	0.0379
1985-01-01	0.0018
1985-04-01	-0.0295
1985-07-01	0.0620
1985-10-01	0.0230
1986-01-01	-0.0213
1986-04-01	0.7023
1986-07-01	0.0566
1986-10-01	0.0129
1987-01-01	0.3257
1987-04-01	0.0665
1987-07-01	0.4489
1987-10-01	0.0883
1988-01-01	0.9801
1988-04-01	0.2153
1988-07-01	0.8880
1988-10-01	0.4933
1989-01-01	0.9712
1989-04-01	0.5063
1989-07-01	0.3296
1989-10-01	0.6865
1990-01-01	0.3413
1990-04-01	0.2332
1990-07-01	0.7690
1990-10-01	0.6614
1991-01-01	0.2900
1991-04-01	1.4669
1991-07-01	0.3604
1991-10-01	0.2256
1992-01-01	1.1696
1992-04-01	0.4616
1992-07-01	-0.0393
1992-10-01	0.3723
1993-01-01	-0.3608
1993-04-01	0.0752
1993-07-01	0.5997
1993-10-01	0.6349
1994-01-01	-0.0715
1994-04-01	0.5668
1994-07-01	0.3785
1994-10-01	2.0243
1995-01-01	0.6579
1995-04-01	1.4579
1995-07-01	1.8581
1995-10-01	0.2716
1996-01-01	0.9183
1996-04-01	1.1747
1996-07-01	2.0891
1996-10-01	1.4402
1997-01-01	-0.0779
1997-04-01	1.1813
1997-07-01	1.0762
1997-10-01	0.6540
1998-01-01	1.4832
1998-04-01	4.0118
1998-07-01	0.1856
1998-10-01	0.4615
1999-01-01	2.4565
1999-04-01	2.5464
1999-07-01	4.8886
1999-10-01	1.8041
2000-01-01	1.3126
2000-04-01	2.7517
2000-07-01	1.3827
2000-10-01	4.9376
2001-01-01	12.0356
2001-04-01	6.4731
2001-07-01	4.5008
2001-10-01	7.4534
2002-01-01	5.7542
2002-04-01	5.9770
2002-07-01	0.2137
2002-10-01	3.4510
2003-01-01	6.8283
2003-04-01	6.4609
2003-07-01	4.6999
2003-10-01	18.5737
2004-01-01	4.7251
2004-04-01	10.6848
2004-07-01	2.5247
2004-10-01	8.7654
2005-01-01	11.9469
2005-04-01	22.6364
2005-07-01	24.3876
2005-10-01	17.3685
2006-01-01	8.4095
2006-04-01	14.2742
2006-07-01	19.5310
2006-10-01	22.6405
2007-01-01	6.4349
2007-04-01	15.6426
2007-07-01	13.8642
2007-10-01	19.8388
2008-01-01	-1.5009
2008-04-01	18.2695
2008-07-01	-3.7329
2008-10-01	-2.3507
2009-01-01	-6.6055
2009-04-01	10.2240
2009-07-01	19.5099
2009-10-01	10.3000
2010-01-01	0.3867
2010-04-01	-8.6316
2010-07-01	-6.2507
2010-10-01	4.1846
2011-01-01	3.4833
2011-04-01	0.1270
2011-07-01	3.2559
2011-10-01	0.1439
2012-01-01	13.1398
2012-04-01	5.7322
2012-07-01	6.3031
2012-10-01	13.6827
2013-01-01	15.0644
2013-04-01	18.2074
2013-07-01	3.6324
2013-10-01	12.5768
2014-01-01	7.1826
2014-04-01	11.0425
2014-07-01	1.7945
2014-10-01	-1.9604
2015-01-01	29.3002
2015-04-01	10.5674