Quarter	Billions of US Dollars
1993-10-01	0.09430
1994-04-01	0.04500
1994-10-01	0.15000
1996-04-01	0.25000
1997-01-01	0.15000
1997-04-01	0.30000
1999-10-01	0.58546
2004-01-01	0.50000
2005-01-01	0.60000
2006-01-01	0.80000
2007-04-01	0.75000
2014-04-01	2.00000
2014-10-01	1.00000