Quarter	Billions of US Dollars
2001-07-01	0.08900
2001-10-01	0.08955
2002-01-01	0.07536
2002-04-01	0.07567
2002-07-01	0.00900
2002-10-01	0.05883
2004-01-01	0.30000
2005-01-01	0.00956
2007-04-01	0.20600