{"entity":{"iso2":"BG","iso3":"BGR","name":"Bulgaria","slug":"bulgaria"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"fossil-fuel-production-over-the-long-term","source":"Energy Institute - Statistical Review of World Energy (2026); Etemad & Luciani (1991); U.S. Energy Information Administration (2026) \u2013 with major processing by Our World in Data","source_url":"https://ourworldindata.org/grapher/fossil-fuel-production-over-the-long-term","title":"Fossil fuel production by 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