{"entity":{"iso2":"NG","iso3":"NGA","name":"Nigeria","slug":"nigeria"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"coal-proved-reserves","source":"U.S. Energy Information Administration (2026) \u2013 with major processing by Our World in Data","source_url":"https://ourworldindata.org/grapher/coal-proved-reserves","title":"Coal reserves","unit":"tonnes"},"observations":[{"date":"2008-01-01","value":355000000.0},{"date":"2009-01-01","value":355000000.0},{"date":"2010-01-01","value":355000000.0},{"date":"2011-01-01","value":355000000.0},{"date":"2012-01-01","value":344000000.0},{"date":"2013-01-01","value":344000000.0},{"date":"2014-01-01","value":2144000000.0},{"date":"2015-01-01","value":2144000000.0},{"date":"2016-01-01","value":2144000000.0},{"date":"2017-01-01","value":2144000000.0},{"date":"2018-01-01","value":2144000000.0},{"date":"2019-01-01","value":2144000000.0},{"date":"2020-01-01","value":2144000000.0},{"date":"2021-01-01","value":2144000000.0},{"date":"2022-01-01","value":2144000000.0},{"date":"2023-01-01","value":2144000000.0}],"summary":{"latest_period":"2023-01-01","latest_value":2144000000.0,"max":2144000000.0,"mean":1471750000.0,"min":344000000.0,"of":216,"rank":33,"trend":"volatile"}}