Quarter	Billions of US Dollars
1999-04-01	0.01875
1999-07-01	0.16364
1999-10-01	-0.11102
2000-01-01	0.00514
2000-04-01	0.00605
2000-07-01	-0.08347
2006-10-01	0.01745
2007-10-01	-0.01680