Quarter	Billions of US Dollars
2007-01-01	0.20
2007-04-01	0.20
2007-07-01	0.20
2007-10-01	0.20
2008-01-01	0.20
2008-04-01	0.70
2008-07-01	0.70
2008-10-01	0.70
2009-01-01	0.70
2009-04-01	0.70
2009-07-01	0.70
2009-10-01	0.70
2010-01-01	0.70
2010-04-01	0.70
2010-07-01	0.95
2010-10-01	0.95
2011-01-01	0.95
2011-04-01	0.95
2011-07-01	0.95
2011-10-01	0.95
2012-01-01	0.75
2012-04-01	1.00
2012-07-01	1.75
2012-10-01	1.75
2013-01-01	1.75
2013-04-01	1.75
2013-07-01	1.75
2013-10-01	1.90
2014-01-01	1.90
2014-04-01	1.90
2014-07-01	1.90
2014-10-01	1.90
2015-01-01	1.90
2015-04-01	1.90