Quarter	Billions of US Dollars
1989-10-01	-4.517
1990-01-01	8.090
1990-04-01	3.446
1990-07-01	9.780
1990-10-01	-2.447
1991-01-01	13.599
1991-04-01	2.188
1991-07-01	1.051
1991-10-01	-0.368
1992-01-01	9.997
1992-04-01	2.233
1992-07-01	2.336
1992-10-01	-2.513
1993-01-01	-13.859
1993-04-01	3.102
1993-07-01	86.970
1993-10-01	2.852
1994-01-01	4.918
1994-04-01	2.585
1994-07-01	1.622
1994-10-01	-6.360
1995-01-01	-4.056
1995-04-01	5.939
1995-07-01	9.511
1995-10-01	8.878
1996-01-01	6.473
1996-04-01	23.084
1996-07-01	-8.382
1996-10-01	10.302
1997-01-01	9.034
1997-04-01	5.670
1997-07-01	12.366
1997-10-01	0.463
1998-01-01	8.070
1998-04-01	-1.095
1998-07-01	16.708
1998-10-01	4.589
1999-01-01	30.962
1999-04-01	8.939
1999-07-01	37.227
1999-10-01	24.566
2000-01-01	27.562
2000-04-01	44.124
2000-07-01	28.480
2000-10-01	43.176
2001-01-01	7.090
2001-04-01	-26.596
2001-07-01	-37.970
2001-10-01	-4.683
2002-01-01	-5.931
2002-04-01	5.602
2002-07-01	17.715
2002-10-01	-8.854
2003-01-01	47.976
2003-04-01	1.991
2003-07-01	-28.453
2003-10-01	40.269
2004-01-01	29.683
2004-04-01	5.111
2004-07-01	26.793
2004-10-01	13.357
2005-01-01	38.184
2005-04-01	19.147
2005-07-01	11.243
2005-10-01	-15.178
2006-01-01	70.859
2006-04-01	33.757
2006-07-01	22.925
2006-10-01	29.585
2007-01-01	129.576
2007-04-01	86.766
2007-07-01	-9.570
2007-10-01	-25.866
2008-01-01	121.020
2008-04-01	49.498
2008-07-01	-29.907
2008-10-01	-109.809
2009-01-01	-43.787
2009-04-01	-75.642
2009-07-01	23.164
2009-10-01	-125.414
2010-01-01	52.009
2010-04-01	-48.653
2010-07-01	29.619
2010-10-01	-57.091
2011-01-01	37.388
2011-04-01	-11.207
2011-07-01	21.784
2011-10-01	-6.109
2012-01-01	111.377
2012-04-01	-25.380
2012-07-01	-48.616
2012-10-01	-16.798
2013-01-01	10.535
2013-04-01	13.151
2013-07-01	23.191
2013-10-01	-34.522
2014-01-01	-1.827
2014-04-01	46.866
2014-07-01	35.524
2014-10-01	-13.367
2015-01-01	49.175
2015-04-01	-24.837