Month Millions of Dollars 2011-01-01 0.00000000000000 2011-02-01 0.00000000000000 2011-03-01 0.00000000000000 2011-04-01 0.00000000000000 2011-05-01 38.87749199999999 2011-06-01 27.97663800000000 2011-07-01 32.97919800000000 2011-08-01 31.47201300000000 2011-09-01 32.71571899999999 2011-10-01 59.42802700000000 2011-11-01 96.72712000000000 2011-12-01 77.50185200000000 2012-01-01 88.40935200000000 2012-02-01 67.76137700000000 2012-03-01 76.78029000000000 2012-04-01 51.25104300000000 2012-05-01 40.43240500000000 2012-06-01 34.41719900000000 2012-07-01 31.80189300000000 2012-08-01 40.80284400000000 2012-09-01 30.32979400000000 2012-10-01 66.17079900000000 2012-11-01 92.83489300000000 2012-12-01 81.44895700000000 2013-01-01 81.89444600000000 2013-02-01 77.72256000000000 2013-03-01 69.28558300000000 2013-04-01 59.62865300000000 2013-05-01 44.08181400000000 2013-06-01 113.53268400000000 2013-07-01 38.42248400000000 2013-08-01 40.76267700000000 2013-09-01 30.44500600000000 2013-10-01 79.35365600000000 2013-11-01 99.36896200000000 2013-12-01 94.39954300000000 2014-01-01 90.50595100000000 2014-02-01 85.37506800000000 2014-03-01 67.84228100000000 2014-04-01 48.52046900000000 2014-05-01 43.54257300000000 2014-06-01 36.01791800000000 2014-07-01 37.81937000000000 2014-08-01 47.18308300000000 2014-09-01 43.68993600000000 2014-10-01 78.12025600000000 2014-11-01 99.09249100000000 2014-12-01 99.85669000000000 2015-01-01 96.65962300000000 2015-02-01 88.25827200000000 2015-03-01 76.38191500000000 2015-04-01 50.69155400000000 2015-05-01 38.78681100000000 2015-06-01 41.69869300000000 2015-07-01 39.76636700000000 2015-08-01 39.29234100000000 2015-09-01 31.54123600000000 2015-10-01 62.80748500000000 2015-11-01 92.41431600000000 2015-12-01 83.12813200000000 2016-01-01 75.38308400000000 2016-02-01 77.14189000000000 2016-03-01 75.82733900000000 2016-04-01 51.99595700000000 2016-05-01 38.28250400000000 2016-06-01 46.40630500000000 2016-07-01 35.49620900000000 2016-08-01 33.63789400000000 2016-09-01 31.61451500000000 2016-10-01 58.09700100000000 2016-11-01 101.77094900000000 2016-12-01 89.17675900000000 2017-01-01 77.19883900000000 2017-02-01 73.70881900000000 2017-03-01 62.37471900000000 2017-04-01 42.11601000000000 2017-05-01 39.73130200000000 2017-06-01 37.69997000000000 2017-07-01 31.79920500000000 2017-08-01 38.46417800000000 2017-09-01 11.26132200000000 2017-10-01 18.67798700000000 2017-11-01 59.72572100000000 2017-12-01 52.39811800000000 2018-01-01 59.78462100000000 2018-02-01 54.92818500000000 2018-03-01 56.37393600000000 2018-04-01 41.63487600000000 2018-05-01 45.84432400000000 2018-06-01 37.01323000000000 2018-07-01 26.71558000000000 2018-08-01 44.65756300000000 2018-09-01 43.17559500000000 2018-10-01 68.64442600000000