In 2010, coal-generated 45 percent of the nation's electricity with 317 gigawatts of coal-fired generating capacity—30 percent of the generating fleet. Last year, the United States generated only 24 percent of its electricity from coal and coal-fired generating capacity fell to 234 gigawatts (as of October 2019). Between 2010 and the first quarter of 2019, U.S. power companies announced the retirement of over 546 coal-fired power units, totaling about 102 gigawatts of generating capacity. Plant owners intend to retire another 17 gigawatts of coal-fired capacity by 2025, according to the Energy Information Administration (EIA). Coal-fired plants have been retired due to regulation beginning with the Mercury and Air Toxics Standards promulgated by the Obama Administration, competition from low-cost natural gas and heavily subsidized and mandated renewable (mainly wind and solar) plants, and relatively flat electricity demand growth.