出典:国際連合
The population is also often classified by educational status 1. ( Individuals who can read and write are called literate 2; those who have reached a certain age and cannot are illiterate 3. Often completion of a particular grade or level of schooling is assumed to confer literacy. Educational attainment statistics 4 classify individuals by grade attainment 5, years of school completed 5 or, more rarely, by age at leaving school 6. Another type of classification is based upon the diploma 7, degree 7 or certificate 7 obtained, and depends on the organization of instruction 8 in each country.
出典:Wiktionary