{"id":"worldbank.timss-eighth-grade-students-reaching-the-advanced-international.bgr.annual","dataset_id":"worldbank-timss-eighth-grade-students-reaching-the-advanced-international","indicator":"timss-eighth-grade-students-reaching-the-advanced-international","geography":"BGR","frequency":"annual","unit":"percent","start_period":"1999","end_period":"2007","org":"World Bank","original_indicator":"LO.TIMSS.MAT8.ADV","url":"https://api.worldbank.org/v2","retrieved_at":"2026-11-07T07:57:03+00:00","version":"1","geography_name":"Bulgaria","region":"Europe & Central Asia","observations":[{"period":"1999","value":8.83991360657168,"flags":""},{"period":"2003","value":3.42035927500997,"flags":""},{"period":"2007","value":4.15667775736914,"flags":""}],"indicator_name":"TIMSS: Eighth grade students reaching the advanced international benchmark of mathematics achievement","topic":"Education","source":"worldbank","provenance":{"organization":"World Bank","original_indicator":"LO.TIMSS.MAT8.ADV","url":"https://api.worldbank.org/v2","retrieved_at":"2026-11-07T07:57:03+00:00","version":"1","license":"see source"}}