Quarter	Billions of US Dollars
1997-10-01	0.01532
1998-01-01	0.01532
1998-04-01	0.00419
1998-07-01	0.00419
2009-04-01	0.14000
2009-07-01	0.14000
2009-10-01	0.14000
2010-01-01	0.14000
2014-04-01	0.45000
2014-07-01	0.45000
2014-10-01	0.45000
2015-01-01	0.45000