Quarter	Billions of US Dollars
1991-10-01	0.05000
1992-04-01	0.30000
1992-07-01	0.74000
1993-01-01	0.50000
1993-10-01	-0.05000
1994-10-01	0.65400
1995-04-01	0.05950
1995-07-01	0.14120
1995-10-01	0.03891
1996-01-01	0.85072
1996-10-01	0.01000
1997-01-01	0.01000
1997-07-01	-0.28562
1997-10-01	-0.40000
1998-01-01	-0.50781
1999-01-01	0.11327
1999-07-01	1.41840
1999-10-01	-0.40000
2000-01-01	-0.23351
2000-04-01	0.01876
2000-07-01	0.05392
2000-10-01	0.00455
2001-01-01	0.21256
2001-04-01	0.06442
2001-10-01	-0.01000
2002-10-01	-0.08137
2003-01-01	-0.16832
2003-07-01	1.85000
2003-10-01	0.62296
2004-01-01	-0.11937
2004-07-01	-0.09098
2005-04-01	-0.01858
2005-07-01	-0.05214
2005-10-01	-0.01279
2006-01-01	-0.47141
2006-04-01	-0.06905
2007-01-01	-0.58527
2007-04-01	-0.01473
2007-07-01	-0.08491
2008-10-01	-0.61040
2009-01-01	-0.01601
2009-07-01	-1.50000
2013-07-01	-1.25000
2015-01-01	-0.01840