{"entity":{"iso2":"PL","iso3":"POL","name":"Poland","slug":"poland"},"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":-56.785},{"date":"1976-01-01","value":-55.7093},{"date":"1977-01-01","value":108.594},{"date":"1978-01-01","value":-40.7303},{"date":"1979-01-01","value":-19.7472},{"date":"1980-01-01","value":-54.3307},{"date":"1981-01-01","value":21.1207},{"date":"1982-01-01","value":60.8541},{"date":"1983-01-01","value":-59.0708},{"date":"1984-01-01","value":76.2162},{"date":"1985-01-01","value":-6.74847},{"date":"1986-01-01","value":-59.8684},{"date":"1987-01-01","value":141.803},{"date":"1988-01-01","value":-41.0169},{"date":"1989-01-01","value":-38.5057},{"date":"1990-01-01","value":172.897},{"date":"1991-01-01","value":3.42466},{"date":"1992-01-01","value":95.3642},{"date":"1993-01-01","value":-46.7797},{"date":"1994-01-01","value":121.975},{"date":"1995-01-01","value":-21.2339},{"date":"1996-01-01","value":-39.8907},{"date":"1997-01-01","value":533.939},{"date":"1998-01-01","value":37.2371},{"date":"1999-01-01","value":-69.488},{"date":"2000-01-01","value":159.018},{"date":"2001-01-01","value":6.25826},{"date":"2002-01-01","value":-25.8399},{"date":"2003-01-01","value":13.7584},{"date":"2004-01-01","value":45.2311},{"date":"2005-01-01","value":-34.8341},{"date":"2006-01-01","value":-20.7792},{"date":"2007-01-01","value":30.2951},{"date":"2010-01-01","value":-47.0293},{"date":"2013-01-01","value":-53.3746},{"date":"2017-01-01","value":-55.2605},{"date":"2018-01-01","value":-49.3803},{"date":"2021-01-01","value":-75.8713},{"date":"2022-01-01","value":106.111},{"date":"2023-01-01","value":148.518},{"date":"2025-01-01","value":-65.4818}],"summary":{"latest_period":"2025-01-01","latest_value":-65.4818,"max":533.939,"mean":20.6063,"min":-75.8713,"of":191,"rank":64,"trend":"volatile"}}