{"entity":{"iso2":"BG","iso3":"BGR","name":"Bulgaria","slug":"bulgaria"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"percentage-change-energy-by-source","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/percentage-change-energy-by-source","title":"Year-to-year percentage change in primary energy use by source","unit":"%"},"observations":[{"date":"2008-01-01","value":178.333},{"date":"2009-01-01","value":1856.29},{"date":"2010-01-01","value":355.005},{"date":"2011-01-01","value":578.52},{"date":"2012-01-01","value":672.042},{"date":"2013-01-01","value":78.7587},{"date":"2014-01-01","value":-9.72249},{"date":"2015-01-01","value":9.94787},{"date":"2016-01-01","value":0.458059},{"date":"2017-01-01","value":1.07926},{"date":"2018-01-01","value":-4.28961},{"date":"2019-01-01","value":5.54801},{"date":"2020-01-01","value":3.62904},{"date":"2021-01-01","value":-0.144474},{"date":"2022-01-01","value":42.7684},{"date":"2023-01-01","value":68.1462},{"date":"2024-01-01","value":55.9103},{"date":"2025-01-01","value":24.3934}],"summary":{"latest_period":"2025-01-01","latest_value":24.3934,"max":1856.29,"mean":217.593,"min":-9.72249,"of":76,"rank":38,"trend":"volatile"}}