Quarter	Billions of US Dollars
1987-01-01	-0.01805
1987-04-01	0.36186
1987-07-01	0.03070
1987-10-01	-0.00531
1988-01-01	-0.02423
1988-07-01	0.10000
1988-10-01	0.07680
1989-01-01	0.08554
1989-04-01	0.06000
1989-07-01	0.09000
1989-10-01	0.07500
1990-01-01	-0.00300
1990-07-01	-0.10000
1990-10-01	-0.02199
1991-07-01	-0.10000
1992-01-01	-0.00200
1992-04-01	-0.07475
1992-10-01	0.10000
1993-04-01	0.00530
1993-07-01	0.11299
1993-10-01	0.36259
1994-01-01	0.95078
1994-04-01	-0.01086
1994-07-01	0.00651
1994-10-01	0.17918
1995-01-01	-0.02171
1995-04-01	-0.19157
1995-07-01	0.59438
1995-10-01	-0.11140
1996-01-01	0.42056
1996-04-01	0.37103
1996-07-01	1.53087
1996-10-01	1.57499
1997-01-01	1.00314
1997-04-01	0.05047
1997-07-01	-0.13062
1997-10-01	-0.07499
1998-01-01	2.18802
1998-04-01	1.16421
1998-07-01	2.41306
1998-10-01	-0.05300
1999-01-01	0.14282
1999-04-01	-0.08046
1999-07-01	0.34785
1999-10-01	-1.30352
2000-01-01	0.77175
2000-04-01	0.48371
2000-07-01	-1.03881
2000-10-01	3.18879
2001-01-01	0.80879
2001-04-01	0.77879
2001-07-01	0.73421
2001-10-01	-0.47880
2002-01-01	-1.64480
2002-04-01	0.91304
2002-07-01	-0.03030
2002-10-01	0.80863
2003-01-01	-0.11107
2003-04-01	-0.26204
2003-07-01	-0.87517
2003-10-01	2.96793
2004-01-01	-0.45701
2004-04-01	0.49652
2004-07-01	0.78367
2004-10-01	0.46113
2005-01-01	1.10813
2005-04-01	0.59226
2005-07-01	-0.08820
2005-10-01	0.84166
2006-01-01	-0.22434
2006-04-01	1.69421
2006-07-01	0.54166
2006-10-01	-1.87415
2007-01-01	2.40542
2007-04-01	4.41504
2007-07-01	-0.21717
2007-10-01	-1.11805
2008-01-01	0.81666
2008-04-01	1.22637
2008-07-01	0.94440
2008-10-01	-0.89825
2009-01-01	4.91802
2009-04-01	1.89922
2009-07-01	1.43252
2009-10-01	2.70602
2010-01-01	1.98108
2010-04-01	-0.29315
2010-07-01	3.43713
2010-10-01	3.97572
2011-01-01	1.37887
2011-04-01	1.13363
2011-07-01	-0.53838
2011-10-01	0.32432
2012-01-01	1.98527
2012-04-01	3.67570
2012-07-01	1.76198
2012-10-01	1.43030
2013-01-01	2.13663
2013-04-01	3.59725
2013-07-01	1.33166
2013-10-01	1.09899
2014-01-01	2.40867
2014-04-01	-0.87251
2014-07-01	0.20243
2014-10-01	2.37314
2015-01-01	1.64010
2015-04-01	0.88682