Quarter	Billions of US Dollars
1993-07-01	-0.00562
1993-10-01	0.03360
1994-04-01	-0.06000
1994-07-01	0.05060
1995-01-01	0.01010
1998-07-01	0.04338
1998-10-01	0.02500
1999-01-01	-0.00846
1999-04-01	0.15853
1999-07-01	-0.04288
1999-10-01	0.02870
2000-01-01	0.08335
2000-04-01	-0.02986
2000-07-01	0.07606
2000-10-01	-0.02732
2001-01-01	0.07382
2001-04-01	-0.08758
2001-07-01	0.00890
2001-10-01	0.05000
2002-04-01	0.07500
2002-07-01	-0.00481
2003-01-01	-0.01500
2003-04-01	0.12193
2003-07-01	-0.00895
2004-01-01	0.18354
2004-04-01	0.01000
2004-07-01	0.01588
2004-10-01	0.02588
2005-01-01	-0.00955
2005-04-01	-0.01000
2005-10-01	-0.00500
2006-01-01	0.07596
2006-04-01	-0.03068
2006-07-01	0.28666
2006-10-01	0.08000
2007-04-01	0.29070
2007-10-01	0.07500
2008-01-01	0.20647
2008-04-01	-0.22023
2008-07-01	0.13417
2008-10-01	-0.02000
2009-01-01	-0.05906
2009-07-01	-0.06130
2009-10-01	0.01795
2010-01-01	-0.06696
2010-04-01	-0.00107
2010-07-01	0.00962
2010-10-01	0.06528
2011-01-01	-0.14728
2011-04-01	0.99778
2011-07-01	0.00409
2011-10-01	-0.05000
2012-04-01	-0.02500
2012-07-01	-0.00001
2012-10-01	-0.04296
2013-01-01	-0.05214
2013-07-01	0.00665
2013-10-01	0.02398
2014-01-01	0.00537
2014-04-01	-0.04262
2014-07-01	-0.03075
2014-10-01	-0.07500
2015-01-01	0.03000
2015-04-01	-0.81915