Quarter	Billions of US Dollars
1987-01-01	0.05000
1987-04-01	0.05000
1990-01-01	0.01500
1990-04-01	0.00500
1990-07-01	0.29000
1990-10-01	0.54400
1991-01-01	0.54500
1991-04-01	0.57000
1991-07-01	0.57300
1991-10-01	0.55000
1992-01-01	0.54200
1992-04-01	0.56700
1992-07-01	0.71200
1992-10-01	0.80300
1993-01-01	0.79900
1993-04-01	0.79600
1993-07-01	0.79600
1993-10-01	0.79400
1994-01-01	0.79850
1994-04-01	0.79000
1994-07-01	1.01400
1994-10-01	1.08900
1995-01-01	1.10900
1995-04-01	1.10900
1995-07-01	1.19900
1995-10-01	1.47900
1996-01-01	1.45900
1996-04-01	1.45900
1996-07-01	1.48771
1996-10-01	1.74783
1997-01-01	2.13299
1997-04-01	2.37613
1997-07-01	2.07131
1997-10-01	1.95884
1998-01-01	1.38298
1998-04-01	1.31583
1998-07-01	1.29252
1998-10-01	1.17900
1999-01-01	1.17900
1999-04-01	1.17900
1999-07-01	1.12000
1999-10-01	1.04500
2000-01-01	1.02000
2000-04-01	1.02000
2000-07-01	1.02000
2000-10-01	0.92000
2001-01-01	0.92000
2001-04-01	0.92000
2001-07-01	0.75500
2001-10-01	0.75500
2002-01-01	0.75500
2002-04-01	0.75500
2002-07-01	0.58500
2002-10-01	0.73500
2003-01-01	0.74000
2003-04-01	1.26000
2003-07-01	1.41000
2003-10-01	1.41000
2004-01-01	1.69000
2004-04-01	1.69000
2004-07-01	1.69000
2004-10-01	1.69000
2005-01-01	1.69000
2005-04-01	1.69000
2005-07-01	1.79000
2005-10-01	1.35000
2006-01-01	1.35000
2006-04-01	1.35000
2006-07-01	1.35000
2006-10-01	1.35000
2007-01-01	1.35000
2007-04-01	1.35000
2007-07-01	1.35000
2007-10-01	1.20000
2008-01-01	1.20000
2008-04-01	0.90000
2008-07-01	0.90000
2008-10-01	0.75000
2009-01-01	0.45000
2009-04-01	0.55000
2009-07-01	0.55000
2009-10-01	0.55000
2010-01-01	0.55000
2010-04-01	0.55000
2010-07-01	0.45000
2010-10-01	0.45000
2011-01-01	0.45000
2011-04-01	0.45000
2011-07-01	0.45000
2011-10-01	0.45000
2012-01-01	0.45000
2012-04-01	0.45000
2012-07-01	0.45000
2012-10-01	0.45000
2013-01-01	0.82500
2013-04-01	1.09000
2013-07-01	1.09000
2013-10-01	1.09000
2014-01-01	1.09000
2014-04-01	1.09000
2014-07-01	1.09000
2014-10-01	1.09000
2015-01-01	1.59000
2015-04-01	1.59000