Quarter	Billions of US Dollars
1993-07-01	0.03000
1993-10-01	0.01500
1994-01-01	-0.01500
1994-07-01	-0.03000
1995-04-01	0.05000
1996-04-01	-0.05000
1996-10-01	0.03000
1997-04-01	0.02500
1997-10-01	-0.03000
1998-04-01	-0.02500
2007-04-01	0.40444
2008-01-01	-0.36015
2009-01-01	-0.06703