并列第3：石油与天然气开采

    由于美国增加了原油和页岩气的产量，以便减少对进口的依赖，这一行业在美国得以飞速发展。该行业与去年一样排在榜单第三，纯利润率则由15.1%升至16.4%。

    Tied 3. Oil and gas extraction

    Oil and gas are booming in the U.S. thanks to increased production of crude oil and shale gas that is making the country less reliant on foreign imports. As such, this industry sector remained in third place with a profit margin that increased from 15.1% to 16.4%.