As of 2010 Turkmenistan featured eight major power plants operating on natural gas, in Mary, Ashgabat, Balkanabat, Buzmeyin (suburb of Ashgabat), Dashoguz, Turkmenbashy, Turkmenabat, and Seydi. As of 2013, Turkmenistan had 10 electrical power plants equipped with 32 turbines, including 14 steam-driven, 15 gas powered, and 3 hydroelectric.  Power output in 2011 was 18.27 billion kWh, of which 2.5 billion kWh was exported.  Major power generating installations include the Hindukush Hydroelectric Station, which has a rated capacity of 350 megawatts, and the Mary Thermoelectric Power Station, which has a rated capacity of 1,370 megawatts. In 2018, electrical power production totaled more than 21 billion kilowatt-hours.