Quarter	Billions of US Dollars
1993-07-01	9.6613
1993-10-01	-0.5300
1994-01-01	0.8853
1994-04-01	-0.3812
1994-07-01	0.9939
1994-10-01	-0.8858
1995-01-01	-0.9441
1995-04-01	0.2950
1995-07-01	-0.8459
1995-10-01	1.3513
1996-01-01	1.5339
1996-04-01	1.6684
1996-07-01	-0.9559
1996-10-01	-1.0532
1997-01-01	2.8080
1997-04-01	1.9760
1997-07-01	-0.9303
1997-10-01	-0.2083
1998-01-01	1.7945
1998-04-01	0.6996
1998-07-01	0.6816
1998-10-01	1.4494
1999-01-01	0.9988
1999-04-01	1.9058
1999-07-01	-0.1432
1999-10-01	3.9833
2000-01-01	-2.9639
2000-04-01	2.9273
2000-07-01	2.9974
2000-10-01	7.8538
2001-01-01	-3.8332
2001-04-01	4.0145
2001-07-01	0.1638
2001-10-01	-3.2799
2002-01-01	1.3069
2002-04-01	-3.2213
2002-07-01	-0.8010
2002-10-01	-1.1988
2003-01-01	2.7572
2003-04-01	2.8716
2003-07-01	-4.8092
2003-10-01	2.0705
2004-01-01	-1.1608
2004-04-01	-0.0775
2004-07-01	-0.9379
2004-10-01	-0.3412
2005-01-01	0.0715
2005-04-01	2.8043
2005-07-01	-4.8706
2005-10-01	-0.5673
2006-01-01	6.9249
2006-04-01	5.4152
2006-07-01	-3.6327
2006-10-01	-6.9400
2007-01-01	4.3471
2007-04-01	0.2788
2007-07-01	-3.5078
2007-10-01	-7.0918
2008-01-01	7.9763
2008-04-01	7.1170
2008-07-01	1.2736
2008-10-01	4.7092
2009-01-01	-12.1329
2009-04-01	0.4486
2009-07-01	-6.4594
2009-10-01	-8.7358
2010-01-01	1.1612
2010-04-01	2.4418
2010-07-01	-6.0214
2010-10-01	-1.6747
2011-01-01	1.8941
2011-04-01	9.6431
2011-07-01	-3.4409
2011-10-01	-0.7953
2012-01-01	-3.1059
2012-04-01	8.1008
2012-07-01	-5.9786
2012-10-01	-2.9131
2013-01-01	7.0092
2013-04-01	5.8014
2013-07-01	0.3417
2013-10-01	-7.2336
2014-01-01	3.6949
2014-04-01	3.7888
2014-07-01	0.7731
2014-10-01	1.9618
2015-01-01	8.4760
2015-04-01	4.0420