Quarter	Billions of US Dollars
1999-04-01	0.00676
1999-07-01	0.01130
2000-04-01	0.00629
2000-07-01	0.00006
2001-07-01	0.00768
2007-07-01	0.06148
2007-10-01	0.22965
2008-01-01	0.18671
2008-04-01	0.12584
2008-07-01	0.03360