Quarter	Billions of US Dollars
1988-07-01	0.1000
1988-10-01	-0.0300
1989-07-01	-0.0400
1990-10-01	-0.0600
1991-04-01	0.1744
1991-10-01	0.1573
1992-04-01	0.1733
1992-07-01	-0.0410
1993-07-01	0.1812
1993-10-01	-0.0409
1994-01-01	0.0155
1994-04-01	0.0180
1994-07-01	-0.0230
1994-10-01	-0.0100
1995-01-01	0.0010
1995-07-01	0.1303
1995-10-01	0.0675
1996-01-01	-0.0471
1996-04-01	0.4550
1996-07-01	-0.1700
1996-10-01	-0.1237
1997-01-01	0.1526
1997-04-01	-0.0028
1997-07-01	0.0375
1997-10-01	-0.0245
1998-01-01	0.2689
1998-04-01	-0.0656
1998-07-01	-0.0467
1998-10-01	-0.1355
1999-01-01	1.0641
1999-04-01	0.4404
1999-07-01	0.8948
1999-10-01	1.3875
2000-01-01	2.1805
2000-04-01	2.1492
2000-07-01	2.3893
2000-10-01	1.2569
2001-01-01	1.9236
2001-04-01	3.3607
2001-07-01	0.9441
2001-10-01	-0.3857
2002-01-01	2.4195
2002-04-01	4.5014
2002-07-01	-1.0255
2002-10-01	0.8322
2003-01-01	1.3099
2003-04-01	4.3867
2003-07-01	0.5459
2003-10-01	2.8879
2004-01-01	3.5237
2004-04-01	1.5813
2004-07-01	1.7403
2004-10-01	0.7636
2005-01-01	0.9572
2005-04-01	0.5750
2005-07-01	-4.0431
2005-10-01	7.9730
2006-01-01	3.6258
2006-04-01	0.9496
2006-07-01	2.2340
2006-10-01	8.4158
2007-01-01	0.8383
2007-04-01	12.2039
2007-07-01	0.5119
2007-10-01	0.8737
2008-01-01	1.7027
2008-04-01	8.9343
2008-07-01	-0.8945
2008-10-01	-9.0340
2009-01-01	3.1250
2009-04-01	8.7755
2009-07-01	6.9658
2009-10-01	-4.8547
2010-01-01	6.9718
2010-04-01	-13.0998
2010-07-01	-4.3511
2010-10-01	-1.3165
2011-01-01	-3.8087
2011-04-01	-2.1179
2011-07-01	-3.7852
2011-10-01	0.5191
2012-01-01	-6.8990
2012-04-01	1.2723
2012-07-01	-4.5944
2012-10-01	-0.5554
2013-01-01	-1.7973
2013-04-01	-6.4005
2013-07-01	-1.0794
2013-10-01	-2.3942
2014-01-01	-1.1579
2014-04-01	-10.6334
2014-07-01	-4.0690
2014-10-01	-2.8286
2015-01-01	-1.4853
2015-04-01	-1.4925