Quarter	Billions of US Dollars
1993-07-01	0.15000
1993-10-01	-0.06000
1994-01-01	0.26000
1994-04-01	0.09670
1994-07-01	0.05000
1994-10-01	0.05000
1995-01-01	-0.07500
1995-10-01	-0.15000
1996-01-01	-0.02000
1996-04-01	0.25000
1996-07-01	-0.23208
1996-10-01	0.24250
1997-01-01	-0.11900
1997-04-01	0.08630
1997-07-01	0.58504
1997-10-01	-0.00292
1998-04-01	0.50000
1998-07-01	0.08000
1999-04-01	0.19222
1999-10-01	1.08500
2000-04-01	2.09046
2000-07-01	0.41997
2000-10-01	0.04953
2001-01-01	-0.25000
2001-04-01	-0.85241
2001-07-01	0.03286
2001-10-01	3.66323
2002-01-01	0.08000
2002-04-01	-0.02810
2002-07-01	-0.50185
2003-01-01	0.20000
2003-04-01	-0.04500
2003-07-01	1.10972
2003-10-01	2.76500
2004-01-01	0.10358
2004-04-01	0.42000
2004-07-01	-0.64370
2004-10-01	1.01283
2005-01-01	0.02500
2005-04-01	-0.20461
2005-07-01	-0.52307
2005-10-01	-0.18171
2006-01-01	-0.02500
2006-04-01	1.37315
2006-07-01	0.27152
2006-10-01	0.38383
2007-01-01	-0.15326
2007-04-01	0.92112
2007-07-01	0.12058
2007-10-01	1.09886
2008-01-01	0.58402
2008-07-01	0.44000
2008-10-01	-0.75368
2009-04-01	0.16093
2009-07-01	1.33151
2009-10-01	0.10000
2010-01-01	0.52313
2010-04-01	0.45216
2010-07-01	0.79980
2010-10-01	0.80455
2011-01-01	0.20000
2011-04-01	0.05159
2011-07-01	-0.03870
2011-10-01	-1.97268
2012-01-01	0.84370
2012-04-01	-1.23105
2012-07-01	1.40816
2012-10-01	0.03706
2013-01-01	1.48516
2013-04-01	-0.26826
2013-07-01	1.02058
2013-10-01	-0.92557
2014-01-01	0.64891
2014-04-01	0.13671
2014-07-01	1.20517
2014-10-01	-0.78939
2015-01-01	0.11712
2015-04-01	1.74512