Quarter	Billions of US Dollars
1987-01-01	0.4755
1987-04-01	0.4797
1987-07-01	0.1171
1987-10-01	0.0033
1988-01-01	0.8886
1988-04-01	0.8343
1988-07-01	0.1459
1988-10-01	0.4511
1989-01-01	0.7074
1989-04-01	-0.1840
1989-07-01	0.1635
1989-10-01	1.5204
1990-01-01	0.0720
1990-04-01	0.8281
1990-07-01	0.6172
1990-10-01	-0.1847
1991-01-01	-0.1754
1991-04-01	1.2861
1991-07-01	0.3899
1991-10-01	0.1367
1992-01-01	0.7483
1992-04-01	0.2979
1992-07-01	1.2988
1992-10-01	0.2992
1993-01-01	1.1678
1993-04-01	0.5598
1993-07-01	2.0503
1993-10-01	1.1923
1994-01-01	1.8974
1994-04-01	0.9197
1994-07-01	-0.2599
1994-10-01	-0.0739
1995-01-01	-0.7129
1995-04-01	-1.0644
1995-07-01	1.1530
1995-10-01	0.2937
1996-01-01	2.3086
1996-04-01	0.4738
1996-07-01	1.7114
1996-10-01	1.5538
1997-01-01	0.5962
1997-04-01	0.0816
1997-07-01	0.6967
1997-10-01	0.4210
1998-01-01	-1.0904
1998-04-01	-0.0078
1998-07-01	-0.9035
1998-10-01	-0.6877
1999-01-01	-0.4664
1999-04-01	1.8625
1999-07-01	0.5140
1999-10-01	1.3159
2000-01-01	3.1368
2000-04-01	2.0529
2000-07-01	1.3811
2000-10-01	0.3154
2001-01-01	-1.6571
2001-04-01	-0.4375
2001-07-01	-0.4415
2001-10-01	0.6527
2002-01-01	0.3246
2002-04-01	1.8542
2002-07-01	0.7284
2002-10-01	-0.9388
2003-01-01	0.5767
2003-04-01	2.7146
2003-07-01	1.6651
2003-10-01	3.3273
2004-01-01	1.2584
2004-04-01	-1.8494
2004-07-01	3.1014
2004-10-01	-0.9061
2005-01-01	1.1157
2005-04-01	4.7893
2005-07-01	0.0080
2005-10-01	2.3837
2006-01-01	4.3402
2006-04-01	2.3305
2006-07-01	1.9911
2006-10-01	1.2807
2007-01-01	3.4153
2007-04-01	4.2555
2007-07-01	0.5851
2007-10-01	3.6162
2008-01-01	-1.7503
2008-04-01	3.1812
2008-07-01	3.6760
2008-10-01	-1.1431
2009-01-01	4.6470
2009-04-01	3.0013
2009-07-01	7.7634
2009-10-01	7.3897
2010-01-01	3.1504
2010-04-01	-0.0210
2010-07-01	0.8127
2010-10-01	1.0973
2011-01-01	1.1174
2011-04-01	4.5044
2011-07-01	-0.5109
2011-10-01	-2.0302
2012-01-01	2.9417
2012-04-01	4.5645
2012-07-01	0.9712
2012-10-01	10.8943
2013-01-01	6.5408
2013-04-01	1.5328
2013-07-01	1.5761
2013-10-01	-2.7715
2014-01-01	-0.9984
2014-04-01	-2.6822
2014-07-01	2.8628
2014-10-01	2.1000
2015-01-01	-3.6253
2015-04-01	5.0432