{"entity":{"iso2":"PL","iso3":"POL","name":"Poland","slug":"poland"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"annual-percentage-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-percentage-change-hydro","title":"Annual percentage change in primary energy from hydropower","unit":"%"},"observations":[{"date":"1966-01-01","value":0.0},{"date":"1967-01-01","value":6.80803},{"date":"1968-01-01","value":5.01568},{"date":"1969-01-01","value":-19.403},{"date":"1970-01-01","value":118.642},{"date":"1971-01-01","value":-11.406},{"date":"1972-01-01","value":-4.2065},{"date":"1973-01-01","value":-3.12708},{"date":"1974-01-01","value":45.7418},{"date":"1975-01-01","value":-6.22055},{"date":"1976-01-01","value":-17.3367},{"date":"1977-01-01","value":18.9666},{"date":"1978-01-01","value":-0.306594},{"date":"1979-01-01","value":-7.38083},{"date":"1980-01-01","value":29.9945},{"date":"1981-01-01","value":-9.02511},{"date":"1982-01-01","value":-27.796},{"date":"1983-01-01","value":8.55476},{"date":"1984-01-01","value":-15.9403},{"date":"1985-01-01","value":31.5341},{"date":"1986-01-01","value":-16.3607},{"date":"1987-01-01","value":7.23047},{"date":"1988-01-01","value":7.94702},{"date":"1989-01-01","value":-10.2621},{"date":"1990-01-01","value":-11.9329},{"date":"1991-01-01","value":0.564566},{"date":"1992-01-01","value":5.75439},{"date":"1993-01-01","value":-1.26079},{"date":"1994-01-01","value":16.4651},{"date":"1995-01-01","value":8.88632},{"date":"1996-01-01","value":2.33175},{"date":"1997-01-01","value":1.5536},{"date":"1998-01-01","value":17.746},{"date":"1999-01-01","value":-6.66956},{"date":"2000-01-01","value":-2.27378},{"date":"2001-01-01","value":10.3989},{"date":"2002-01-01","value":-1.97851},{"date":"2003-01-01","value":-26.6784},{"date":"2004-01-01","value":24.5961},{"date":"2005-01-01","value":5.71566},{"date":"2006-01-01","value":-7.22399},{"date":"2007-01-01","value":15.1812},{"date":"2008-01-01","value":-8.46089},{"date":"2009-01-01","value":10.3112},{"date":"2010-01-01","value":22.9474},{"date":"2011-01-01","value":-20.137},{"date":"2012-01-01","value":-12.6501},{"date":"2013-01-01","value":19.7349},{"date":"2014-01-01","value":-10.4961},{"date":"2015-01-01","value":-16.0788},{"date":"2016-01-01","value":16.7576},{"date":"2017-01-01","value":19.6821},{"date":"2018-01-01","value":-23.0469},{"date":"2019-01-01","value":-0.588016},{"date":"2020-01-01","value":8.16582},{"date":"2021-01-01","value":10.4254},{"date":"2022-01-01","value":-15.86},{"date":"2023-01-01","value":22.4229},{"date":"2024-01-01","value":-12.2424},{"date":"2025-01-01","value":-27.8095}],"summary":{"latest_period":"2025-01-01","latest_value":-27.8095,"max":118.642,"mean":2.76528,"min":-27.8095,"of":68,"rank":60,"trend":"volatile"}}