Quarter	Billions of US Dollars
1987-01-01	0.3240
1987-04-01	0.1039
1987-07-01	0.0269
1987-10-01	0.1555
1988-01-01	0.3205
1988-04-01	0.4722
1988-07-01	0.0197
1988-10-01	0.6535
1989-01-01	0.6345
1989-04-01	0.5350
1989-07-01	0.6555
1989-10-01	0.1316
1990-01-01	0.2940
1990-04-01	-0.0867
1990-07-01	-0.1988
1990-10-01	-0.2221
1991-01-01	-0.3675
1991-04-01	0.0370
1991-07-01	-0.1536
1991-10-01	-0.0977
1992-01-01	0.0143
1992-04-01	-0.3226
1992-07-01	-0.1036
1992-10-01	-0.4749
1993-01-01	-0.3580
1993-04-01	-0.3219
1993-07-01	0.8973
1993-10-01	-0.4195
1994-01-01	-0.2130
1994-04-01	-0.8173
1994-07-01	0.1092
1994-10-01	-0.3343
1995-01-01	0.0353
1995-04-01	0.0921
1995-07-01	0.4576
1995-10-01	-0.4326
1996-01-01	0.0635
1996-04-01	0.2909
1996-07-01	0.1438
1996-10-01	-0.6416
1997-01-01	-0.0514
1997-04-01	1.1472
1997-07-01	-0.1573
1997-10-01	0.4740
1998-01-01	0.1221
1998-04-01	1.0101
1998-07-01	-0.0273
1998-10-01	0.1516
1999-01-01	0.4554
1999-04-01	0.5053
1999-07-01	1.6288
1999-10-01	-0.8003
2000-01-01	0.2140
2000-04-01	0.0530
2000-07-01	-0.0286
2000-10-01	0.5414
2001-01-01	1.5928
2001-04-01	0.2208
2001-07-01	0.0393
2001-10-01	0.3723
2002-01-01	-0.3436
2002-04-01	-0.1823
2002-07-01	-0.5457
2002-10-01	0.8674
2003-01-01	2.1588
2003-04-01	1.0156
2003-07-01	0.5329
2003-10-01	2.0372
2004-01-01	1.7736
2004-04-01	1.1551
2004-07-01	-0.6017
2004-10-01	1.0746
2005-01-01	5.3942
2005-04-01	3.6291
2005-07-01	2.5047
2005-10-01	5.0113
2006-01-01	3.0634
2006-04-01	2.3595
2006-07-01	1.1701
2006-10-01	5.3383
2007-01-01	7.8536
2007-04-01	5.8419
2007-07-01	-1.3102
2007-10-01	-2.5065
2008-01-01	-0.3013
2008-04-01	5.9954
2008-07-01	8.4148
2008-10-01	0.4131
2009-01-01	8.1000
2009-04-01	2.2064
2009-07-01	6.1516
2009-10-01	-2.1769
2010-01-01	-3.4874
2010-04-01	5.1681
2010-07-01	-16.7899
2010-10-01	1.3314
2011-01-01	1.1232
2011-04-01	-0.3820
2011-07-01	0.2913
2011-10-01	-1.7655
2012-01-01	3.6644
2012-04-01	-5.0665
2012-07-01	0.5272
2012-10-01	0.0844
2013-01-01	-1.0414
2013-04-01	-6.4891
2013-07-01	-2.0717
2013-10-01	1.9276
2014-01-01	-1.9400
2014-04-01	-1.3166
2014-07-01	1.2413
2014-10-01	0.9459
2015-01-01	4.2477
2015-04-01	-1.2719