{"entity":{"iso2":"PL","iso3":"POL","name":"Poland","slug":"poland"},"indicator":{"licence":"CC BY 4.0 (World Bank Open Data)","slug":"pisa-15-year-olds-by-mathematics-proficiency-level-percent-level-4","source":"OECD Programme for International Student Assessment (PISA)","source_url":"https://data.worldbank.org/indicator/LO.PISA.MAT.4","title":"PISA: 15-year-olds by mathematics proficiency level (%). Level 4","unit":null},"observations":[{"date":"2003-01-01","value":17.697},{"date":"2006-01-01","value":18.6056},{"date":"2009-01-01","value":18.9945},{"date":"2012-01-01","value":21.335},{"date":"2015-01-01","value":20.6234},{"date":"2018-01-01","value":22.2998}],"summary":{"latest_period":"2018-01-01","latest_value":22.2998,"max":22.2998,"mean":19.9259,"min":17.697,"of":53,"rank":9,"trend":"rising"}}