{"entity":{"iso2":"BG","iso3":"BGR","name":"Bulgaria","slug":"bulgaria"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"annual-change-hydro","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-hydro","title":"Annual change in primary energy from hydropower","unit":"terawatt-hours"},"observations":[{"date":"1966-01-01","value":0.00999999},{"date":"1967-01-01","value":0.0120001},{"date":"1968-01-01","value":-0.717},{"date":"1969-01-01","value":0.534},{"date":"1970-01-01","value":0.313},{"date":"1971-01-01","value":0.0180001},{"date":"1972-01-01","value":-0.075},{"date":"1973-01-01","value":0.475},{"date":"1974-01-01","value":-0.49},{"date":"1975-01-01","value":0.373},{"date":"1976-01-01","value":0.501},{"date":"1977-01-01","value":0.575},{"date":"1978-01-01","value":-0.62},{"date":"1979-01-01","value":0.402},{"date":"1980-01-01","value":0.402},{"date":"1981-01-01","value":-0.095},{"date":"1982-01-01","value":-0.568},{"date":"1983-01-01","value":0.303},{"date":"1984-01-01","value":-0.0930002},{"date":"1985-01-01","value":-1.023},{"date":"1986-01-01","value":0.0890002},{"date":"1987-01-01","value":0.211},{"date":"1988-01-01","value":0.0590003},{"date":"1989-01-01","value":0.0949998},{"date":"1990-01-01","value":-1.061},{"date":"1991-01-01","value":0.638},{"date":"1992-01-01","value":-0.365},{"date":"1993-01-01","value":-0.116},{"date":"1994-01-01","value":-0.491},{"date":"1995-01-01","value":0.878},{"date":"1996-01-01","value":0.714},{"date":"1997-01-01","value":-0.164},{"date":"1998-01-01","value":0.344},{"date":"1999-01-01","value":-0.336},{"date":"2000-01-01","value":-0.101},{"date":"2001-01-01","value":-0.98},{"date":"2002-01-01","value":0.465},{"date":"2003-01-01","value":0.879},{"date":"2004-01-01","value":0.143811},{"date":"2005-01-01","value":1.15862},{"date":"2006-01-01","value":-0.0844541},{"date":"2007-01-01","value":-1.38313},{"date":"2008-01-01","value":-0.037137},{"date":"2009-01-01","value":0.639002},{"date":"2010-01-01","value":1.59963},{"date":"2011-01-01","value":-2.15976},{"date":"2012-01-01","value":0.306055},{"date":"2013-01-01","value":0.858502},{"date":"2014-01-01","value":0.565491},{"date":"2015-01-01","value":1.05291},{"date":"2016-01-01","value":-1.7747},{"date":"2017-01-01","value":-1.05174},{"date":"2018-01-01","value":2.31847},{"date":"2019-01-01","value":-2.21708},{"date":"2020-01-01","value":-0.109101},{"date":"2021-01-01","value":1.99881},{"date":"2022-01-01","value":-1.01593},{"date":"2023-01-01","value":-0.723147},{"date":"2024-01-01","value":-0.292984},{"date":"2025-01-01","value":-0.00445318}],"summary":{"latest_period":"2025-01-01","latest_value":-0.00445318,"max":2.31847,"mean":0.0130449,"min":-2.21708,"of":77,"rank":36,"trend":"volatile"}}