{"entity":{"iso2":"PT","iso3":"PRT","name":"Portugal","slug":"portugal"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"annual-change-gas","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-gas","title":"Annual change in primary energy from gas","unit":"terawatt-hours"},"observations":[{"date":"1997-01-01","value":1.00625},{"date":"1998-01-01","value":7.03175},{"date":"1999-01-01","value":14.44},{"date":"2000-01-01","value":0.612034},{"date":"2001-01-01","value":2.65881},{"date":"2002-01-01","value":5.57338},{"date":"2003-01-01","value":-1.12002},{"date":"2004-01-01","value":7.63136},{"date":"2005-01-01","value":5.04425},{"date":"2006-01-01","value":-1.69342},{"date":"2007-01-01","value":2.70948},{"date":"2008-01-01","value":4.1296},{"date":"2009-01-01","value":-0.329899},{"date":"2010-01-01","value":4.19403},{"date":"2011-01-01","value":0.649223},{"date":"2012-01-01","value":-6.9819},{"date":"2013-01-01","value":-2.37149},{"date":"2014-01-01","value":-1.92383},{"date":"2015-01-01","value":6.93903},{"date":"2016-01-01","value":2.5395},{"date":"2017-01-01","value":12.6567},{"date":"2018-01-01","value":-5.40104},{"date":"2019-01-01","value":3.35641},{"date":"2020-01-01","value":-0.983624},{"date":"2021-01-01","value":-2.25677},{"date":"2022-01-01","value":-2.22102},{"date":"2023-01-01","value":-11.1847},{"date":"2024-01-01","value":-7.86759},{"date":"2025-01-01","value":4.04785}],"summary":{"latest_period":"2025-01-01","latest_value":4.04785,"max":14.44,"mean":1.40981,"min":-11.1847,"of":76,"rank":28,"trend":"volatile"}}