Quarter	Billions of US Dollars
1990-07-01	0.31950
1990-10-01	0.26000
1992-07-01	0.15000
1992-10-01	0.22000
1993-07-01	0.02200
1993-10-01	-0.01000
1994-01-01	0.16350
1994-04-01	0.00350
1994-07-01	0.22400
1994-10-01	0.20200
1995-01-01	0.01100
1995-04-01	0.00700
1995-07-01	0.18050
1995-10-01	0.27400
1996-01-01	-0.02400
1996-04-01	0.00500
1996-07-01	0.26366
1996-10-01	0.55324
1997-01-01	0.54912
1997-04-01	0.34681
1997-07-01	-0.22041
1997-10-01	-0.28115
1998-01-01	-0.49390
1998-04-01	-0.03758
1998-07-01	-0.04069
1998-10-01	-0.21492
1999-01-01	-0.15900
1999-07-01	-0.06600
1999-10-01	-0.08300
2000-01-01	-0.02500
2000-04-01	-0.10000
2000-10-01	-0.10000
2001-07-01	-0.16900
2001-10-01	0.12500
2002-01-01	-0.15000
2002-07-01	-0.04500
2002-10-01	0.15000
2003-01-01	0.00500
2003-04-01	0.52000
2003-07-01	-0.10000
2003-10-01	-0.18500
2004-01-01	-0.02000
2004-10-01	0.00500
2005-04-01	0.15000
2005-07-01	-0.13000
2005-10-01	-0.44000
2006-01-01	0.06000
2006-04-01	-0.01500
2006-07-01	0.01500
2006-10-01	-0.17000
2007-01-01	-0.01500
2007-07-01	-0.12500
2007-10-01	-0.15500
2008-04-01	-0.30000
2008-10-01	-0.15000
2009-04-01	0.10000
2012-04-01	0.50000
2013-01-01	0.37500
2013-04-01	0.26500
2015-04-01	-0.15000