<prompt> Translate the following text to EnglishKatika mwaka huo huo, mitambo ya makaa ya mawe nchini Marekani ilitoa asilimia 51 ya kilowatt-saa bilioni 3,691 za umeme.  <response>: In that same year, coal-fired U.S. plants produced about 51 percent of 3,691 billion kWh, or 