Quarter	Billions of US Dollars
1993-07-01	0.20000
1996-10-01	0.04000
1998-01-01	0.33110
1998-04-01	0.18500
1998-07-01	0.23632
1998-10-01	0.03677
1999-01-01	0.08843
1999-04-01	0.22322
1999-07-01	0.07185
1999-10-01	0.14860
2000-01-01	0.05363
2000-04-01	0.61103
2000-07-01	0.02071
2001-01-01	-0.09492
2001-04-01	0.16190
2001-07-01	0.47045
2001-10-01	-0.04000
2002-04-01	-0.22500
2002-07-01	0.00422
2002-10-01	0.11790
2003-01-01	0.00103
2003-04-01	-0.59910
2003-07-01	-0.53644
2003-10-01	-0.02441
2004-01-01	0.02701
2004-04-01	-0.00177
2004-10-01	-0.12755
2005-01-01	-0.02060
2005-04-01	0.28344
2005-10-01	0.19446
2006-01-01	-0.15000
2006-10-01	0.71000
2007-04-01	0.75000
2007-07-01	0.27543
2007-10-01	0.00064
2008-01-01	0.57564
2008-04-01	-0.40436
2008-07-01	0.40065
2008-10-01	-0.23560
2009-01-01	1.45229
2009-04-01	1.40913
2009-07-01	0.00065
2009-10-01	0.28565
2010-01-01	0.06955
2010-04-01	0.00596
2010-07-01	0.21744
2010-10-01	0.58750
2011-01-01	0.42500
2011-04-01	0.73749
2011-07-01	-0.32000
2011-10-01	0.72861
2012-01-01	0.40000
2012-04-01	1.07621
2012-07-01	1.47000
2012-10-01	-0.17500
2013-01-01	0.60000
2013-04-01	-0.25000
2013-07-01	1.92017
2013-10-01	0.34421
2014-01-01	0.50000
2014-04-01	-1.54126
2014-07-01	0.01290
2014-10-01	-0.14998
2015-01-01	0.29602
2015-04-01	0.33225