Quarter	Billions of US Dollars
1987-01-01	0.03700
1987-04-01	0.03000
1987-07-01	0.03500
1989-10-01	0.02800
2005-07-01	0.68932
2005-10-01	0.74298
2006-01-01	1.27022
2006-04-01	0.60740
2006-07-01	0.17877
2006-10-01	0.30770
2007-01-01	0.30091
2007-04-01	0.41550
2007-07-01	0.23078
2007-10-01	0.12900
2008-01-01	0.19121
2008-04-01	0.15135
2008-07-01	0.13226
2008-10-01	0.02505
2012-04-01	0.08795
2012-07-01	0.05733
2013-07-01	0.03314
2013-10-01	0.03365
2014-01-01	0.03394
2014-04-01	0.03370