Quarter	Billions of US Dollars
1993-07-01	0.55197
1993-10-01	1.52548
1994-01-01	0.70095
1994-04-01	-0.08850
1994-07-01	0.00500
1994-10-01	0.88794
1995-01-01	-0.31750
1995-04-01	-0.06241
1995-07-01	0.18292
1995-10-01	0.53504
1996-01-01	-0.04100
1996-04-01	0.74107
1996-07-01	0.38250
1996-10-01	-0.00994
1997-01-01	0.89455
1997-04-01	1.01350
1997-07-01	1.67274
1997-10-01	-0.46018
1998-01-01	0.55887
1998-04-01	2.05389
1998-07-01	-0.31282
1998-10-01	-0.20983
1999-01-01	0.00549
1999-04-01	0.38051
1999-07-01	0.35227
1999-10-01	-0.72482
2000-01-01	-0.10820
2000-04-01	0.07535
2000-07-01	0.21245
2000-10-01	-1.25631
2001-01-01	0.02261
2001-04-01	-0.02377
2001-07-01	-0.08323
2001-10-01	-0.56573
2002-01-01	-0.10800
2002-04-01	-0.49379
2002-07-01	-0.95506
2002-10-01	-0.17206
2003-01-01	-0.48400
2003-04-01	-0.55866
2003-07-01	-0.60125
2004-01-01	-1.00500
2004-04-01	-0.58981
2004-07-01	-0.47154
2004-10-01	0.15000
2005-01-01	0.15000
2005-04-01	-0.64860
2005-07-01	-0.16100
2005-10-01	0.24000
2006-07-01	0.07550
2006-10-01	0.22000
2007-01-01	-0.12500
2007-04-01	-0.04985
2007-07-01	-0.30000
2007-10-01	0.69500
2008-01-01	-0.30959
2008-04-01	-1.27550
2008-07-01	-0.33500
2009-01-01	-0.44500
2009-04-01	-0.17578
2009-10-01	0.35000
2010-04-01	-0.02450
2010-07-01	0.39953
2010-10-01	0.29301
2011-01-01	0.36500
2011-04-01	-0.07170
2011-07-01	0.33866
2011-10-01	-0.04840
2012-01-01	-0.15000
2012-04-01	0.01300
2012-07-01	-0.17500
2013-01-01	0.30000
2013-04-01	0.19300
2013-10-01	0.67500
2014-01-01	-0.09830
2014-04-01	1.33000
2014-07-01	0.14000
2014-10-01	-0.45616
2015-01-01	0.50000
2015-04-01	1.50000