Month Millions of Dollars 2011-01-01 0.000000000000000 2011-02-01 0.000000000000000 2011-03-01 0.000000000000000 2011-04-01 0.000000000000000 2011-05-01 39.990711000000005 2011-06-01 79.327095000000000 2011-07-01 105.057162000000020 2011-08-01 77.593966000000000 2011-09-01 72.577944000000000 2011-10-01 81.798995000000020 2011-11-01 68.543595000000000 2011-12-01 32.931325000000010 2012-01-01 70.515997000000000 2012-02-01 88.025811000000000 2012-03-01 73.926357000000000 2012-04-01 94.377854000000000 2012-05-01 81.963273000000000 2012-06-01 60.445791000000000 2012-07-01 128.290090000000000 2012-08-01 38.111662000000000 2012-09-01 70.008342000000000 2012-10-01 69.195504000000000 2012-11-01 61.259842000000000 2012-12-01 14.074739000000000 2013-01-01 65.402730000000000 2013-02-01 40.944924000000000 2013-03-01 20.720023000000000 2013-04-01 43.572336000000000 2013-05-01 100.973829000000000 2013-06-01 55.269643000000000 2013-07-01 15.081019000000000 2013-08-01 25.286275000000000 2013-09-01 5.390921000000000 2013-10-01 13.908149000000000 2013-11-01 8.471856000000000 2013-12-01 6.532592000000000 2014-01-01 11.648861000000000 2014-02-01 15.676789000000000 2014-03-01 21.365991000000000 2014-04-01 67.611751000000000 2014-05-01 40.878186000000000 2014-06-01 36.420374000000000 2014-07-01 18.296951000000000 2014-08-01 16.958467000000000 2014-09-01 11.376538000000000 2014-10-01 21.643051000000000 2014-11-01 43.989395000000000 2014-12-01 63.444587000000000 2015-01-01 8.442162000000000 2015-02-01 26.849697000000000 2015-03-01 49.918051000000000 2015-04-01 50.682369000000000 2015-05-01 17.212259000000000 2015-06-01 43.857532000000000 2015-07-01 29.293175000000000 2015-08-01 23.270848000000000 2015-09-01 24.361575000000000 2015-10-01 26.006949000000000 2015-11-01 14.429963000000000 2015-12-01 20.904529000000000 2016-01-01 9.773617000000000 2016-02-01 21.948650000000000 2016-03-01 24.427656000000000 2016-04-01 18.766842000000000 2016-05-01 17.548463000000000 2016-06-01 19.984168000000000 2016-07-01 20.709023000000000 2016-08-01 25.248709000000000 2016-09-01 20.578887000000000 2016-10-01 18.568604000000000 2016-11-01 38.742063000000000 2016-12-01 24.611001000000000 2017-01-01 18.443092000000000 2017-02-01 23.865434000000000 2017-03-01 21.935426000000000 2017-04-01 15.754032000000000 2017-05-01 15.765056000000000 2017-06-01 15.638869000000000 2017-07-01 6.124679000000000 2017-08-01 18.036839000000000 2017-09-01 3.067132000000000 2017-10-01 7.518351000000000 2017-11-01 2.192983000000000 2017-12-01 2.266558000000000 2018-01-01 4.402465000000000 2018-02-01 41.949304000000000 2018-03-01 8.595126000000000 2018-04-01 3.673512000000000 2018-05-01 3.083920000000000 2018-06-01 2.123943000000000 2018-07-01 7.034834000000000 2018-08-01 3.839814000000000 2018-09-01 4.559552000000000 2018-10-01 10.061604000000000