{"entity":{"iso2":"BG","iso3":"BGR","name":"Bulgaria","slug":"bulgaria"},"indicator":{"licence":"CC BY 4.0 (World Bank Open Data)","slug":"pisa-male-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.MA","title":"PISA: Male 15-year-olds by mathematics proficiency level (%). Level 4","unit":null},"observations":[{"date":"2006-01-01","value":6.96891},{"date":"2009-01-01","value":8.22418},{"date":"2012-01-01","value":10.4803},{"date":"2015-01-01","value":10.7787},{"date":"2018-01-01","value":9.63457}],"summary":{"latest_period":"2018-01-01","latest_value":9.63457,"max":10.7787,"mean":9.21734,"min":6.96891,"of":53,"rank":40,"trend":"rising"}}