{"entity":{"iso2":"BG","iso3":"BGR","name":"Bulgaria","slug":"bulgaria"},"indicator":{"licence":"CC BY 4.0 (World Bank Open Data)","slug":"pisa-15-year-olds-by-mathematics-proficiency-level-percent-level-2","source":"OECD Programme for International Student Assessment (PISA)","source_url":"https://data.worldbank.org/indicator/LO.PISA.MAT.2","title":"PISA: 15-year-olds by mathematics proficiency level (%). Level 2","unit":null},"observations":[{"date":"2006-01-01","value":22.0366},{"date":"2009-01-01","value":23.4291},{"date":"2012-01-01","value":24.3778},{"date":"2015-01-01","value":23.6749},{"date":"2018-01-01","value":23.7248}],"summary":{"latest_period":"2018-01-01","latest_value":23.7248,"max":24.3778,"mean":23.4486,"min":22.0366,"of":53,"rank":18,"trend":"rising"}}