{"entity":{"iso2":null,"iso3":null,"name":"USSR","slug":"ussr"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"annual-change-coal","source":"Energy Institute - Statistical Review of World Energy (2026); Smil (2017) \u2013 with major processing by Our World in Data","source_url":"https://ourworldindata.org/grapher/annual-change-coal","title":"Annual change in primary energy from coal","unit":"terawatt-hours"},"observations":[{"date":"1966-01-01","value":126.031},{"date":"1967-01-01","value":55.501},{"date":"1968-01-01","value":-31.7498},{"date":"1969-01-01","value":68.6287},{"date":"1970-01-01","value":-47.2056},{"date":"1971-01-01","value":73.4116},{"date":"1972-01-01","value":99.218},{"date":"1973-01-01","value":45.0728},{"date":"1974-01-01","value":18.8914},{"date":"1975-01-01","value":110.072},{"date":"1976-01-01","value":-4.30591},{"date":"1977-01-01","value":71.3616},{"date":"1978-01-01","value":-24.4739},{"date":"1979-01-01","value":29.095},{"date":"1980-01-01","value":-123.245},{"date":"1981-01-01","value":-24.9065},{"date":"1982-01-01","value":59.7434},{"date":"1983-01-01","value":10.1592},{"date":"1984-01-01","value":-37.4741}],"summary":{"latest_period":"1984-01-01","latest_value":-37.4741,"max":126.031,"mean":24.9381,"min":-123.245,"of":3,"rank":3,"trend":"volatile"}}