Eurostat, Luxembourg. Participation rate in education and training (last 4 weeks) by type, sex, age and educational attainment level: Training: Formal and non-formal education and training / International Standard Classification of Education (ISCED 2011): All ISCED 2011 levels / Sex: Total / Unit of measure: Percentage / Age class: From 15 to 29 years / Geopolitical entity (reporting): Bulgaria.