{"entity":{"iso2":"TO","iso3":"TON","name":"Tonga","slug":"tonga"},"indicator":{"licence":"Derived by Statizoid from the sources named on the page","slug":"pertussis-number-of-reported-cases-annual-growth-rate","source":"Statizoid (derived)","source_url":null,"title":"Pertussis - number of reported cases, annual growth rate","unit":"% change on previous year"},"observations":[{"date":"1975-01-01","value":-100.0},{"date":"1979-01-01","value":-30.0},{"date":"1980-01-01","value":-98.6395},{"date":"1981-01-01","value":-100.0},{"date":"1983-01-01","value":-90.4943},{"date":"1984-01-01","value":-92.0},{"date":"1985-01-01","value":-50.0},{"date":"1986-01-01","value":-50.0},{"date":"1987-01-01","value":-100.0},{"date":"1990-01-01","value":200.0},{"date":"1991-01-01","value":-100.0},{"date":"2002-01-01","value":100.0},{"date":"2003-01-01","value":-100.0},{"date":"2006-01-01","value":-77.7778},{"date":"2007-01-01","value":-100.0},{"date":"2010-01-01","value":-100.0},{"date":"2013-01-01","value":-100.0}],"summary":{"latest_period":"2013-01-01","latest_value":-100.0,"max":200.0,"mean":-58.1713,"min":-100.0,"of":191,"rank":128,"trend":"volatile"}}