Quarter	Billions of US Dollars
1999-04-01	0.02208
1999-07-01	0.18229
1999-10-01	0.07283
2000-01-01	0.07784
2000-04-01	0.08347
2006-10-01	0.01741
2007-01-01	0.01734
2007-04-01	0.01731
2007-07-01	0.01705