Quarter Billions of US Dollars 2006-10-01 0.2000 2007-01-01 0.2000 2007-04-01 0.2000 2007-07-01 0.2000 2007-10-01 0.2300 2008-01-01 0.2300 2008-04-01 0.2300 2008-07-01 0.2300 2008-10-01 0.2300 2009-01-01 0.2300 2009-04-01 0.2300 2009-07-01 0.2300 2009-10-01 0.2300 2010-01-01 0.1989 2010-04-01 0.1989 2010-07-01 0.1989 2010-10-01 0.1989 2011-01-01 0.1989 2011-04-01 0.1989 2011-07-01 0.1989 2011-10-01 0.1689 2012-01-01 0.1689 2012-04-01 0.1689 2012-07-01 0.1689 2012-10-01 0.1689 2013-01-01 0.1689 2013-04-01 0.1689 2013-07-01 0.1689 2013-10-01 0.1689 2014-01-01 0.1689 2014-04-01 0.1689 2014-07-01 0.1689 2014-10-01 0.1689 2015-01-01 0.1689 2015-04-01 0.1689