Quarter	Billions of US Dollars
1987-01-01	0.1808
1987-04-01	-0.0095
1987-07-01	0.0806
1987-10-01	0.0312
1988-01-01	0.0283
1988-04-01	-0.0146
1988-07-01	0.1869
1988-10-01	0.1439
1989-01-01	-0.0081
1989-04-01	0.1707
1989-10-01	0.5587
1990-01-01	0.0248
1990-04-01	0.1034
1990-07-01	0.2558
1990-10-01	0.1841
1991-01-01	0.2863
1991-04-01	0.0892
1991-07-01	0.1864
1991-10-01	0.0847
1992-01-01	0.0835
1992-04-01	0.1060
1992-07-01	-0.0018
1992-10-01	0.0807
1993-01-01	0.0508
1993-04-01	-0.0391
1993-07-01	-0.1530
1993-10-01	-0.1432
1994-01-01	-0.1978
1994-04-01	0.2268
1994-07-01	0.0399
1994-10-01	0.2024
1995-01-01	0.8418
1995-04-01	0.5519
1995-07-01	0.4037
1995-10-01	0.7206
1996-01-01	-0.0936
1996-04-01	0.1932
1996-07-01	1.1444
1996-10-01	0.2878
1997-01-01	0.1131
1997-04-01	0.6959
1997-07-01	0.3688
1997-10-01	0.3105
1998-01-01	0.1311
1998-04-01	3.9284
1998-07-01	0.2267
1998-10-01	0.6026
1999-01-01	0.6432
1999-04-01	1.6163
1999-07-01	3.8831
1999-10-01	1.3441
2000-01-01	-0.0530
2000-04-01	1.3856
2000-07-01	0.1870
2000-10-01	2.5011
2001-01-01	5.7440
2001-04-01	0.5275
2001-07-01	3.9340
2001-10-01	6.1860
2002-01-01	4.3116
2002-04-01	4.2164
2002-07-01	0.8295
2002-10-01	2.9675
2003-01-01	5.8486
2003-04-01	4.2394
2003-07-01	3.3452
2003-10-01	13.5537
2004-01-01	5.9993
2004-04-01	8.2955
2004-07-01	0.4898
2004-10-01	6.4161
2005-01-01	6.8785
2005-04-01	14.3693
2005-07-01	15.0130
2005-10-01	12.6552
2006-01-01	1.6004
2006-04-01	11.2526
2006-07-01	18.2049
2006-10-01	12.3058
2007-01-01	5.1451
2007-04-01	4.5704
2007-07-01	9.1941
2007-10-01	11.2585
2008-01-01	4.3812
2008-04-01	9.9040
2008-07-01	-5.9517
2008-10-01	-2.1554
2009-01-01	-6.2359
2009-04-01	4.0975
2009-07-01	22.0470
2009-10-01	9.8356
2010-01-01	0.2109
2010-04-01	-3.1455
2010-07-01	-7.0294
2010-10-01	2.7509
2011-01-01	2.0598
2011-04-01	5.0807
2011-07-01	1.9789
2011-10-01	-1.0766
2012-01-01	8.9741
2012-04-01	0.3405
2012-07-01	4.7067
2012-10-01	1.7319
2013-01-01	12.3511
2013-04-01	20.3834
2013-07-01	4.1953
2013-10-01	9.4544
2014-01-01	13.0147
2014-04-01	11.1190
2014-07-01	-0.9056
2014-10-01	-0.7206
2015-01-01	25.1246
2015-04-01	10.7416