Quarter	Billions of US Dollars
1987-07-01	0.01500
1989-01-01	0.00500
1989-04-01	0.00500
2007-07-01	0.00709
2007-10-01	0.05867
2008-01-01	0.06375
2008-04-01	0.02598
2008-07-01	0.26111