Quarter	Billions of US Dollars
1972-07-01	0.0313
1972-10-01	0.0600
1973-04-01	0.0250
1973-10-01	0.0360
1974-10-01	0.0250
1975-01-01	0.0350
1976-04-01	0.0500
1976-07-01	0.0401
1976-10-01	0.1913
1977-01-01	0.0834
1977-04-01	0.1986
1977-07-01	0.2397
1977-10-01	0.3135
1978-01-01	0.2416
1978-04-01	0.1775
1978-07-01	0.2459
1978-10-01	0.1767
1979-01-01	0.2035
1979-04-01	0.0500
1979-07-01	0.2433
1979-10-01	0.1973
1980-01-01	-0.0350
1980-04-01	0.2600
1980-07-01	0.0551
1981-04-01	-0.0036
1981-07-01	0.0139
1981-10-01	-0.0400
1982-01-01	-0.0006
1982-04-01	-0.0850
1982-07-01	-0.0500
1982-10-01	0.0181
1983-04-01	-0.0269
1983-10-01	-0.0750
1984-04-01	-0.1054
1984-07-01	-0.0514
1984-10-01	-0.0905
1985-10-01	-0.4785
1986-01-01	-0.0757
1986-04-01	-0.1335
1986-10-01	-0.1645
1987-01-01	-0.1359
1987-04-01	-0.0255
1987-07-01	-0.2636
1987-10-01	-0.2806
1988-04-01	-0.3439
1988-07-01	-0.3094
1988-10-01	-0.0929
1989-01-01	-0.2102
1989-04-01	-0.0500
1989-07-01	0.8801
1989-10-01	-0.1870
1990-01-01	-0.0824
1990-04-01	-0.0208
1990-07-01	-0.0055
1991-04-01	-0.0723
1991-07-01	0.4973
1991-10-01	0.9008
1992-01-01	0.7921
1992-04-01	1.7200
1992-07-01	0.1200
1992-10-01	0.0343
1993-01-01	0.1700
1993-04-01	1.7250
1993-07-01	0.8164
1993-10-01	1.7762
1994-01-01	1.0678
1994-04-01	42.5508
1994-07-01	0.2808
1994-10-01	1.2253
1995-01-01	-0.2905
1995-04-01	1.1268
1995-07-01	1.6014
1995-10-01	0.8894
1996-01-01	1.6777
1996-04-01	3.0330
1996-07-01	0.9559
1996-10-01	4.3795
1997-01-01	0.9911
1997-04-01	5.0892
1997-07-01	3.2334
1997-10-01	-0.9891
1998-01-01	1.4483
1998-04-01	3.6399
1998-07-01	0.6044
1998-10-01	-9.3336
1999-01-01	-1.2280
1999-04-01	1.4250
1999-07-01	1.2252
1999-10-01	3.3680
2000-01-01	4.0602
2000-04-01	-3.9155
2000-07-01	6.2916
2000-10-01	1.0646
2001-01-01	2.3824
2001-04-01	-4.9742
2001-07-01	-1.3535
2001-10-01	-1.3481
2002-01-01	1.5484
2002-04-01	0.1594
2002-07-01	-1.2099
2002-10-01	-1.9741
2003-01-01	-0.6657
2003-04-01	2.2524
2003-07-01	0.6089
2003-10-01	2.4699
2004-01-01	1.9359
2004-04-01	-3.7468
2004-07-01	-0.1999
2004-10-01	-1.5784
2005-01-01	1.6826
2005-04-01	-0.4964
2005-07-01	0.0398
2005-10-01	-0.0418
2006-01-01	0.6609
2006-04-01	-11.6646
2006-07-01	3.4654
2006-10-01	2.0459
2007-01-01	1.7473
2007-04-01	1.6202
2007-07-01	-1.0912
2007-10-01	-0.9528
2008-01-01	1.7734
2008-04-01	-2.0633
2008-07-01	-2.0337
2008-10-01	-1.2376
2009-01-01	0.8619
2009-04-01	2.4684
2009-07-01	3.4306
2009-10-01	6.0506
2010-01-01	6.5790
2010-04-01	4.3664
2010-07-01	5.2221
2010-10-01	6.5965
2011-01-01	3.6847
2011-04-01	10.9430
2011-07-01	3.3235
2011-10-01	4.3526
2012-01-01	3.8194
2012-04-01	3.6893
2012-07-01	3.4401
2012-10-01	2.6080
2013-01-01	-0.6467
2013-04-01	3.1070
2013-07-01	1.0310
2013-10-01	2.9868
2014-01-01	2.0311
2014-04-01	3.0906
2014-07-01	11.0471
2014-10-01	-3.7238
2015-01-01	-7.0811
2015-04-01	0.5284