Quarter	Billions of US Dollars
1999-04-01	0.15869
1999-07-01	0.07802
2001-10-01	0.18083
2004-01-01	0.49352
2004-10-01	0.00663
2005-04-01	0.12543
2006-04-01	0.24676
2008-01-01	0.60505
2011-04-01	0.50000
2012-01-01	1.00000
2012-10-01	1.25000
2014-01-01	2.73935
2014-04-01	1.37117
2014-07-01	0.20000
2014-10-01	0.01936