Quarter	Billions of US Dollars
1993-07-01	-7.6517
1993-10-01	-2.1930
1994-01-01	0.3076
1994-04-01	-5.6445
1994-07-01	-7.1578
1994-10-01	-9.7972
1995-01-01	-6.8021
1995-04-01	-6.4919
1995-07-01	-10.6068
1995-10-01	-3.2705
1996-01-01	-3.7922
1996-04-01	-2.7867
1996-07-01	-4.7489
1996-10-01	-7.0080
1997-01-01	-6.8499
1997-04-01	-6.4051
1997-07-01	-7.2947
1997-10-01	-9.5231
1998-01-01	-11.7034
1998-04-01	-9.8809
1998-07-01	-6.2960
1998-10-01	-1.6042
1999-01-01	-3.9953
1999-04-01	-0.4497
1999-07-01	-1.2557
1999-10-01	-8.4057
2000-01-01	-9.8268
2000-04-01	-3.8343
2000-07-01	-3.6526
2000-10-01	-3.4683
2001-01-01	-3.6183
2001-04-01	-2.5159
2001-07-01	-2.2303
2001-10-01	-0.2822
2002-01-01	-0.0163
2002-04-01	3.1295
2002-07-01	-3.1302
2002-10-01	-3.0436
2003-01-01	-2.7972
2003-04-01	0.3206
2003-07-01	-4.0174
2003-10-01	5.1320
2004-01-01	2.5609
2004-04-01	5.3675
2004-07-01	-0.3890
2004-10-01	2.2696
2005-01-01	-0.3382
2005-04-01	0.9683
2005-07-01	-0.7126
2005-10-01	0.4827
2006-01-01	-0.3118
2006-04-01	-0.0653
2006-07-01	-1.7327
2006-10-01	0.6508
2007-01-01	-3.1999
2007-04-01	-0.5916
2007-07-01	-0.5471
2007-10-01	0.5216
2008-01-01	-0.8420
2008-04-01	2.0910
2008-07-01	-0.4777
2008-10-01	-3.6622
2009-01-01	-3.4295
2009-04-01	-7.6097
2009-07-01	-2.4124
2009-10-01	-0.9454
2010-01-01	-1.8469
2010-04-01	-2.8076
2010-07-01	1.8707
2010-10-01	-1.9293
2011-01-01	-1.3458
2011-04-01	-6.7429
2011-07-01	-3.0762
2011-10-01	0.8666
2012-01-01	-0.7238
2012-04-01	-0.5544
2012-07-01	4.7061
2012-10-01	1.5691
2013-01-01	-1.6179
2013-04-01	3.9792
2013-07-01	5.6284
2013-10-01	0.9403
2014-01-01	-1.7655
2014-04-01	3.8475
2014-07-01	3.8848
2014-10-01	2.2911
2015-01-01	-3.3480
2015-04-01	3.2691