Quarter Billions of US Dollars 2009-10-01 0.2 2010-01-01 0.2 2010-04-01 0.2 2010-07-01 0.2 2010-10-01 0.2 2011-01-01 0.2 2011-04-01 0.7 2011-07-01 0.7 2011-10-01 0.7 2012-01-01 0.7 2012-04-01 0.7 2012-07-01 0.7 2012-10-01 0.7 2013-01-01 0.7 2013-04-01 0.7 2013-07-01 0.7 2013-10-01 0.7 2014-01-01 0.7 2014-04-01 0.7 2014-07-01 1.2 2014-10-01 1.0 2015-01-01 1.0 2015-04-01 1.0