Quarter Billions of US Dollars 2011-10-01 1.400 2012-01-01 1.500 2012-04-01 1.500 2012-07-01 1.500 2012-10-01 0.100 2013-04-01 0.495 2013-07-01 0.495 2013-10-01 0.495 2014-01-01 0.495 2014-04-01 0.800 2014-07-01 0.800 2014-10-01 0.800 2015-01-01 0.800