Quarter	Billions of US Dollars
1987-07-01	0.0266
1988-01-01	0.0302
1989-04-01	-0.0043
1989-07-01	0.3723
1990-01-01	0.0208
1991-01-01	-0.0327
1991-07-01	0.0410
1992-01-01	0.2727
1992-10-01	0.4353
1993-01-01	0.0112
1993-04-01	0.1226
1993-07-01	0.0064
1993-10-01	0.1867
1994-01-01	-0.0306
1994-04-01	-0.0321
1994-07-01	-0.1017
1994-10-01	-0.0391
1995-01-01	0.1715
1995-04-01	0.2613
1995-07-01	0.0672
1995-10-01	1.1121
1996-01-01	3.9963
1996-04-01	0.2335
1996-07-01	0.2781
1996-10-01	0.6391
1997-01-01	0.5269
1997-04-01	0.5566
1997-07-01	0.4199
1997-10-01	0.0097
1998-01-01	1.1976
1998-04-01	0.3869
1998-07-01	1.3518
1998-10-01	-0.3620
1999-01-01	1.3939
1999-04-01	1.1542
1999-07-01	1.5486
1999-10-01	1.1422
2000-01-01	0.5597
2000-04-01	1.8057
2000-07-01	0.5318
2000-10-01	-0.0864
2001-01-01	3.1976
2001-04-01	1.1354
2001-07-01	0.6887
2001-10-01	-0.0240
2002-01-01	1.1709
2002-04-01	0.1797
2002-07-01	2.4863
2002-10-01	4.0803
2003-01-01	1.3947
2003-04-01	3.3654
2003-07-01	4.0453
2003-10-01	2.5500
2004-01-01	4.4619
2004-04-01	1.3459
2004-07-01	5.1281
2004-10-01	6.2140
2005-01-01	4.1966
2005-04-01	6.3971
2005-07-01	5.8254
2005-10-01	5.8665
2006-01-01	4.6989
2006-04-01	9.9966
2006-07-01	12.7927
2006-10-01	8.1135
2007-01-01	30.7460
2007-04-01	21.5214
2007-07-01	26.4037
2007-10-01	8.2991
2008-01-01	5.8836
2008-04-01	34.6765
2008-07-01	0.0429
2008-10-01	27.7822
2009-01-01	23.0773
2009-04-01	3.5084
2009-07-01	10.9683
2009-10-01	3.2889
2010-01-01	-6.0089
2010-04-01	6.5529
2010-07-01	-5.3775
2010-10-01	19.2517
2011-01-01	-33.8361
2011-04-01	-5.8187
2011-07-01	-2.4956
2011-10-01	0.6832
2012-01-01	36.8010
2012-04-01	6.7166
2012-07-01	-0.2165
2012-10-01	1.3745
2013-01-01	-0.1821
2013-04-01	-6.3307
2013-07-01	4.7511
2013-10-01	6.8462
2014-01-01	-37.3243
2014-04-01	-4.7243
2014-07-01	-2.2049
2014-10-01	-25.7993
2015-01-01	-26.9416
2015-04-01	14.0900