Quarter	Billions of US Dollars
1987-01-01	0.1000
1987-04-01	0.1642
1987-07-01	0.0245
1987-10-01	0.0990
1988-01-01	0.2346
1988-04-01	0.0345
1988-07-01	0.0281
1988-10-01	0.0401
1989-04-01	0.1045
1989-07-01	0.1237
1989-10-01	0.0456
1990-01-01	0.0716
1990-04-01	0.1290
1990-07-01	0.0319
1990-10-01	-0.1293
1991-01-01	0.0918
1991-04-01	0.1675
1991-07-01	0.0246
1991-10-01	0.3807
1992-01-01	0.0051
1992-04-01	0.2210
1992-07-01	0.0155
1992-10-01	-0.0567
1993-01-01	-0.1849
1993-04-01	0.1044
1993-07-01	0.0631
1993-10-01	-0.0075
1994-01-01	-0.1357
1994-04-01	0.3260
1994-07-01	0.2387
1994-10-01	-0.0390
1995-01-01	-0.0108
1995-04-01	0.3597
1995-07-01	0.4256
1995-10-01	0.4307
1996-01-01	0.2147
1996-04-01	0.8457
1996-07-01	0.1095
1996-10-01	-0.0806
1997-01-01	-0.0226
1997-04-01	0.7802
1997-07-01	-0.0982
1997-10-01	0.4232
1998-01-01	0.2092
1998-04-01	0.2138
1998-07-01	-0.2302
1998-10-01	0.2128
1999-01-01	0.2075
1999-04-01	0.9445
1999-07-01	0.3789
1999-10-01	-0.2946
2000-01-01	-0.0567
2000-04-01	0.2189
2000-07-01	-0.1824
2000-10-01	0.4857
2001-01-01	0.1159
2001-04-01	0.0266
2001-07-01	-0.1424
2001-10-01	-0.0815
2002-01-01	-0.3793
2002-04-01	1.2294
2002-07-01	0.1817
2002-10-01	0.4218
2003-01-01	-0.3376
2003-04-01	-1.0958
2003-07-01	0.0214
2003-10-01	-0.3274
2004-01-01	0.4084
2004-04-01	0.4060
2004-07-01	1.1306
2004-10-01	0.2574
2005-01-01	-0.0558
2005-04-01	3.3527
2005-07-01	0.0099
2005-10-01	0.5000
2006-01-01	0.8314
2006-04-01	1.2093
2006-07-01	0.0163
2006-10-01	4.3087
2007-01-01	1.3026
2007-04-01	1.3175
2007-07-01	3.8057
2007-10-01	4.2234
2008-01-01	0.2115
2008-04-01	4.7531
2008-07-01	-0.2323
2008-10-01	29.8901
2009-01-01	6.8289
2009-04-01	4.2623
2009-07-01	0.9022
2009-10-01	6.0566
2010-01-01	-0.7817
2010-04-01	7.0548
2010-07-01	7.6779
2010-10-01	0.9697
2011-01-01	-0.0048
2011-04-01	-1.4818
2011-07-01	-0.5708
2011-10-01	-0.0302
2012-01-01	-0.4078
2012-04-01	4.2427
2012-07-01	4.6008
2012-10-01	1.6795
2013-01-01	0.5511
2013-04-01	0.8677
2013-07-01	2.1659
2013-10-01	2.2744
2014-01-01	-1.8650
2014-04-01	-1.8663
2014-07-01	0.9097
2014-10-01	1.2373
2015-01-01	1.6040
2015-04-01	-0.1156