{"entity":{"iso2":"SL","iso3":"SLE","name":"Sierra Leone","slug":"sierra-leone"},"indicator":{"licence":"CC BY 4.0 (Our World in Data)","slug":"pm-exposure-1990-2017","source":"Global Burden of Disease Study 2023, Institute for Health Metrics and Evaluation (IHME), via World Bank (2026) \u2013 processed by Our World in Data","source_url":"https://ourworldindata.org/grapher/pm-exposure-1990-2017","title":"Particulate matter exposure in 1990 vs. 2017","unit":"micrograms per cubic meter"},"observations":[{"date":"1990-01-01","value":23.8884},{"date":"1991-01-01","value":23.0356},{"date":"1992-01-01","value":22.9967},{"date":"1993-01-01","value":22.9577},{"date":"1994-01-01","value":22.9188},{"date":"1995-01-01","value":21.2521},{"date":"1996-01-01","value":22.841},{"date":"1997-01-01","value":22.8021},{"date":"1998-01-01","value":22.7632},{"date":"1999-01-01","value":22.7243},{"date":"2000-01-01","value":23.4993},{"date":"2001-01-01","value":20.8343},{"date":"2002-01-01","value":21.8892},{"date":"2003-01-01","value":19.7609},{"date":"2004-01-01","value":26.7024},{"date":"2005-01-01","value":24.0201},{"date":"2006-01-01","value":22.6283},{"date":"2007-01-01","value":22.9831},{"date":"2008-01-01","value":24.556},{"date":"2009-01-01","value":24.0948},{"date":"2010-01-01","value":21.7816},{"date":"2011-01-01","value":24.8501},{"date":"2012-01-01","value":21.8606},{"date":"2013-01-01","value":20.6635},{"date":"2014-01-01","value":20.3513},{"date":"2015-01-01","value":26.6521},{"date":"2016-01-01","value":24.6545},{"date":"2017-01-01","value":23.2385},{"date":"2018-01-01","value":24.0904},{"date":"2019-01-01","value":22.5038},{"date":"2020-01-01","value":22.6717},{"date":"2021-01-01","value":21.367},{"date":"2022-01-01","value":22.3655},{"date":"2023-01-01","value":22.4613}],"summary":{"latest_period":"2023-01-01","latest_value":22.4613,"max":26.7024,"mean":22.9018,"min":19.7609,"of":200,"rank":69,"trend":"flat"}}