Quarter	Billions of US Dollars
1977-04-01	0.0500
1980-04-01	0.0300
1982-04-01	-0.0500
1982-07-01	0.0186
1982-10-01	0.0236
1983-01-01	0.0210
1983-10-01	0.0300
1984-01-01	0.1214
1984-04-01	0.1241
1984-07-01	0.0409
1984-10-01	0.0406
1985-01-01	0.0385
1985-04-01	0.0580
1985-07-01	0.1293
1985-10-01	0.0413
1986-01-01	0.0819
1986-04-01	0.1658
1986-07-01	0.1650
1986-10-01	0.0305
1987-01-01	0.0982
1987-04-01	0.1735
1987-07-01	0.3458
1987-10-01	0.0020
1988-01-01	0.4693
1988-04-01	0.6548
1988-07-01	0.1000
1988-10-01	0.6700
1989-07-01	0.0132
1989-10-01	-0.1000
1990-07-01	-0.0037
1990-10-01	-0.7600
1991-01-01	-0.7404
1991-04-01	0.0659
1991-07-01	-0.0397
1991-10-01	0.1573
1992-04-01	0.0804
1992-07-01	-0.2675
1992-10-01	-0.0360
1993-01-01	0.5122
1993-04-01	-0.3356
1993-07-01	0.9252
1993-10-01	1.0000
1994-01-01	0.7005
1994-04-01	-0.1204
1994-07-01	1.5169
1994-10-01	0.4477
1995-01-01	0.8476
1995-04-01	1.2129
1995-07-01	0.0544
1995-10-01	0.3540
1996-01-01	0.8657
1996-04-01	1.4312
1996-07-01	-0.1709
1996-10-01	0.3967
1997-01-01	0.2588
1997-04-01	0.9737
1997-07-01	0.9394
1997-10-01	0.8884
1998-01-01	0.9021
1998-04-01	0.7706
1998-07-01	0.0711
1998-10-01	0.0140
1999-01-01	-0.9202
1999-04-01	3.3184
1999-07-01	0.9660
1999-10-01	2.2622
2000-01-01	1.4465
2000-04-01	1.8684
2000-07-01	2.7957
2000-10-01	1.1521
2001-01-01	3.9617
2001-04-01	4.0342
2001-07-01	1.9406
2001-10-01	3.6939
2002-01-01	1.7926
2002-04-01	4.5428
2002-07-01	-0.5330
2002-10-01	2.4092
2003-01-01	2.8134
2003-04-01	2.5381
2003-07-01	1.8436
2003-10-01	8.2416
2004-01-01	1.2263
2004-04-01	3.2458
2004-07-01	1.6005
2004-10-01	3.0376
2005-01-01	3.1504
2005-04-01	1.5176
2005-07-01	-1.1495
2005-10-01	13.8029
2006-01-01	5.7327
2006-04-01	0.3140
2006-07-01	5.5877
2006-10-01	9.8424
2007-01-01	1.7288
2007-04-01	12.0978
2007-07-01	0.0241
2007-10-01	4.7927
2008-01-01	6.0344
2008-04-01	6.8350
2008-07-01	2.0434
2008-10-01	6.6327
2009-01-01	15.8582
2009-04-01	11.6591
2009-07-01	9.9694
2009-10-01	2.1175
2010-01-01	8.0530
2010-04-01	-2.6822
2010-07-01	-0.2040
2010-10-01	2.1094
2011-01-01	-2.7391
2011-04-01	-11.2917
2011-07-01	-4.2763
2011-10-01	1.3394
2012-01-01	-9.0090
2012-04-01	-7.1698
2012-07-01	-10.5540
2012-10-01	1.2990
2013-01-01	-2.0225
2013-04-01	-4.9143
2013-07-01	-1.1593
2013-10-01	-0.2645
2014-01-01	-2.6168
2014-04-01	-13.0795
2014-07-01	2.4329
2014-10-01	-7.7320
2015-01-01	-4.4815
2015-04-01	-0.7328