{"entity":{"iso2":"LK","iso3":"LKA","name":"Sri Lanka","slug":"sri-lanka"},"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":155.429},{"date":"1976-01-01","value":-22.4459},{"date":"1977-01-01","value":3.65385},{"date":"1978-01-01","value":-34.7866},{"date":"1979-01-01","value":14.2248},{"date":"1980-01-01","value":-32.5031},{"date":"1981-01-01","value":-7.56458},{"date":"1982-01-01","value":-40.9182},{"date":"1983-01-01","value":-17.5676},{"date":"1984-01-01","value":12.2951},{"date":"1985-01-01","value":95.6204},{"date":"1986-01-01","value":-70.709},{"date":"1987-01-01","value":-80.2548},{"date":"1988-01-01","value":-19.3548},{"date":"1989-01-01","value":144.0},{"date":"1990-01-01","value":344.262},{"date":"1991-01-01","value":-90.7749},{"date":"1992-01-01","value":-76.0},{"date":"1993-01-01","value":200.0},{"date":"1994-01-01","value":-72.2222},{"date":"1996-01-01","value":-48.4375},{"date":"1997-01-01","value":593.939},{"date":"1998-01-01","value":-41.048},{"date":"1999-01-01","value":-17.037},{"date":"2000-01-01","value":73.2143},{"date":"2001-01-01","value":-73.1959},{"date":"2002-01-01","value":-69.2308},{"date":"2003-01-01","value":412.5},{"date":"2004-01-01","value":-45.122},{"date":"2005-01-01","value":-100.0},{"date":"2009-01-01","value":244.444},{"date":"2010-01-01","value":-93.5484},{"date":"2012-01-01","value":165.217},{"date":"2013-01-01","value":9.83607},{"date":"2014-01-01","value":-43.2836},{"date":"2015-01-01","value":181.579},{"date":"2016-01-01","value":-49.5327},{"date":"2017-01-01","value":-100.0},{"date":"2019-01-01","value":-58.3333},{"date":"2020-01-01","value":-80.0},{"date":"2021-01-01","value":-100.0},{"date":"2025-01-01","value":-64.7059}],"summary":{"latest_period":"2025-01-01","latest_value":-64.7059,"max":593.939,"mean":26.2295,"min":-100.0,"of":191,"rank":63,"trend":"volatile"}}