Eurostat, Luxembourg. Population by educational attainment level, sex, age and citizenship (%): Unit of measure: Percentage / Sex: Total / International Standard Classification of Education (ISCED 2011): Less than primary, primary and lower secondary education (levels 0-2) / Country of citizenship: EU27 countries (from 2020) except reporting country / Age class: From 15 to 69 years / Geopolitical entity (reporting): Denmark.