Quarter	Billions of US Dollars
1998-10-01	0.20
1999-01-01	0.20
1999-04-01	0.20
1999-07-01	0.20
2001-10-01	0.35
2002-01-01	0.35
2002-04-01	0.35
2002-07-01	0.35
2003-10-01	0.30
2004-01-01	0.30
2004-04-01	0.30
2004-07-01	0.30
2006-04-01	0.35
2006-07-01	0.35
2006-10-01	0.35
2007-01-01	0.35