Quarter	Billions of US Dollars
1993-07-01	0.09510
1993-10-01	0.08941
1994-01-01	0.09695
2005-07-01	0.05742
2005-10-01	0.08046
2006-01-01	0.08046
2006-04-01	0.08046
2012-10-01	0.21820
2013-01-01	0.21006
2013-04-01	0.21249
2013-07-01	0.22095