{"entity":{"iso2":"SL","iso3":"SLE","name":"Sierra Leone","slug":"sierra-leone"},"indicator":{"licence":"Derived by Statizoid from the sources named on the page","slug":"pertussis-number-of-reported-cases-per-square-kilometre","source":"Statizoid (derived)","source_url":null,"title":"Pertussis - number of reported cases, per square kilometre","unit":"units per square kilometre"},"observations":[{"date":"1979-01-01","value":0.0197423},{"date":"1980-01-01","value":0.02243},{"date":"1981-01-01","value":0.0289415},{"date":"1982-01-01","value":0.0197423},{"date":"1983-01-01","value":0.0239956},{"date":"1984-01-01","value":0.0217927},{"date":"1985-01-01","value":0.0226794},{"date":"1986-01-01","value":0.00170407},{"date":"1987-01-01","value":0.00315877},{"date":"1988-01-01","value":0.000138543},{"date":"1997-01-01","value":0.0},{"date":"2000-01-01","value":0.0},{"date":"2003-01-01","value":0.0},{"date":"2007-01-01","value":0.0},{"date":"2011-01-01","value":0.000318648},{"date":"2021-01-01","value":0.0}],"summary":{"latest_period":"2021-01-01","latest_value":0.0,"max":0.0289415,"mean":0.0102902,"min":0.0,"of":204,"rank":132,"trend":"volatile"}}