{"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-5","source":"OECD Programme for International Student Assessment (PISA)","source_url":"https://data.worldbank.org/indicator/LO.PISA.MAT.5","title":"PISA: 15-year-olds by mathematics proficiency level (%). Level 5","unit":null},"observations":[{"date":"2006-01-01","value":2.47964},{"date":"2009-01-01","value":3.02755},{"date":"2012-01-01","value":3.37525},{"date":"2015-01-01","value":3.61261},{"date":"2018-01-01","value":3.33315}],"summary":{"latest_period":"2018-01-01","latest_value":3.33315,"max":3.61261,"mean":3.16564,"min":2.47964,"of":53,"rank":39,"trend":"rising"}}