گزینههای پاسخ: Missing; Unknown, Not asked in survey, Not applicable, No answer, Don´t know, Argentina (2), Brazil (2), Belarus (2), Chile (2), China (2), Czech Republic (2), India (2), Japan (2), South Korea (2), Mexico (2), Nigeria (2), Poland (2), Russian Federation (2), Slovakia (2), South Africa (2)
گزینههای پاسخ: Missing; Unknown; Inappropiate, Not asked, Not applicable, No answer, Don´t know, None, Less than Primary, Primary, Less than Secondary technical/vocational, Secondary technical/vocational, Less than Secondary university preparatory, Secondary university preparatory, Some university education, University degree, DK/NA
