As of recent data, coal accounts for about 20% of the electricity generated in the United States. This figure has been decreasing over the years due to a shift towards cleaner energy sources such as natural gas, renewables (like wind and solar), and nuclear power. The exact percentage can fluctuate based on factors such as energy market changes and policy adjustments. For the most current and precise figures, checking the latest reports from the U.S. Energy Information Administration (EIA) would be helpful.