Quarter	Billions of US Dollars
1987-01-01	-0.02452
1987-04-01	-0.02700
1988-01-01	-0.42765
1988-04-01	-0.09500
1989-01-01	-0.10949
1989-04-01	-0.05000
1989-10-01	0.07561
1990-01-01	-0.00199
1990-04-01	-0.22345
1990-07-01	0.02239
1990-10-01	-0.00360
1991-01-01	0.56852
1991-04-01	1.06460
1991-07-01	0.05000
1991-10-01	0.07582
1992-01-01	0.49794
1992-04-01	0.16350
1992-07-01	0.30000
1992-10-01	-0.00216
1993-01-01	0.33411
1993-04-01	0.41141
1993-07-01	0.28586
1993-10-01	0.22457
1994-01-01	0.17808
1994-04-01	1.01419
1994-07-01	0.60268
1994-10-01	0.30864
1995-01-01	1.52453
1995-04-01	1.65137
1995-07-01	1.76713
1995-10-01	1.93924
1996-01-01	1.42173
1996-04-01	1.96858
1996-07-01	4.34883
1996-10-01	4.08114
1997-01-01	1.69129
1997-04-01	0.87012
1997-07-01	2.18789
1997-10-01	-0.71232
1998-01-01	-0.82740
1998-04-01	-0.28635
1998-07-01	-0.90124
1998-10-01	-0.70706
1999-01-01	-0.62583
1999-04-01	-1.33655
1999-07-01	-1.67827
1999-10-01	0.34168
2000-01-01	1.09061
2000-04-01	-1.06674
2000-07-01	-0.85549
2000-10-01	-1.16797
2001-01-01	-0.72184
2001-04-01	-1.34297
2001-07-01	-2.25094
2001-10-01	0.05858
2002-01-01	-2.33500
2002-04-01	0.23560
2002-07-01	0.44136
2002-10-01	0.40749
2003-01-01	1.10176
2003-04-01	1.61602
2003-07-01	2.22716
2003-10-01	0.82292
2004-01-01	3.92878
2004-04-01	0.74375
2004-07-01	0.72050
2004-10-01	1.55313
2005-01-01	2.25791
2005-04-01	0.41416
2005-07-01	0.87148
2005-10-01	2.38124
2006-01-01	0.77451
2006-04-01	3.29169
2006-07-01	2.61597
2006-10-01	0.76970
2007-01-01	1.59194
2007-04-01	6.23032
2007-07-01	1.35255
2007-10-01	2.28813
2008-01-01	2.20255
2008-04-01	3.05653
2008-07-01	-1.24690
2008-10-01	-5.74070
2009-01-01	2.85137
2009-04-01	6.59240
2009-07-01	2.50571
2009-10-01	-2.46842
2010-01-01	2.01916
2010-04-01	1.48228
2010-07-01	3.61790
2010-10-01	-0.53730
2011-01-01	3.20470
2011-04-01	0.64013
2011-07-01	4.06399
2011-10-01	5.11158
2012-01-01	4.95430
2012-04-01	-0.50884
2012-07-01	6.29595
2012-10-01	-3.19525
2013-01-01	1.50334
2013-04-01	-3.00573
2013-07-01	8.71794
2013-10-01	4.68849
2014-01-01	0.77289
2014-04-01	-1.15852
2014-07-01	-1.10700
2014-10-01	3.57477
2015-01-01	-0.01321
2015-04-01	4.27553