{"entity":{"iso2":"HK","iso3":"HKG","name":"Hong Kong, China","slug":"hong-kong-sar-china"},"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":"1977-01-01","value":-50.0},{"date":"1978-01-01","value":-100.0},{"date":"1981-01-01","value":-83.3333},{"date":"1982-01-01","value":-50.0},{"date":"1983-01-01","value":-100.0},{"date":"1985-01-01","value":16.6667},{"date":"1986-01-01","value":-95.2381},{"date":"1987-01-01","value":-100.0},{"date":"1989-01-01","value":-50.0},{"date":"1990-01-01","value":100.0},{"date":"1991-01-01","value":-100.0},{"date":"1993-01-01","value":0.0},{"date":"1994-01-01","value":-20.0},{"date":"1995-01-01","value":100.0},{"date":"1996-01-01","value":12.5},{"date":"1997-01-01","value":33.3333},{"date":"1998-01-01","value":-75.0},{"date":"1999-01-01","value":66.6667},{"date":"2000-01-01","value":120.0},{"date":"2001-01-01","value":36.3636},{"date":"2008-01-01","value":-19.3548},{"date":"2009-01-01","value":-36.0},{"date":"2010-01-01","value":-68.75},{"date":"2011-01-01","value":360.0},{"date":"2012-01-01","value":-13.0435},{"date":"2013-01-01","value":0.0},{"date":"2014-01-01","value":50.0},{"date":"2015-01-01","value":66.6667},{"date":"2016-01-01","value":-38.0},{"date":"2017-01-01","value":122.581},{"date":"2018-01-01","value":59.4203},{"date":"2019-01-01","value":-12.7273},{"date":"2020-01-01","value":-77.0833},{"date":"2021-01-01","value":-90.9091},{"date":"2022-01-01","value":50.0},{"date":"2023-01-01","value":400.0},{"date":"2024-01-01","value":153.333},{"date":"2025-01-01","value":-81.5789}],"summary":{"latest_period":"2025-01-01","latest_value":-81.5789,"max":400.0,"mean":12.803,"min":-100.0,"of":191,"rank":80,"trend":"volatile"}}