Response options: Missing; Unknown, Not asked in survey, Not applicable, No answer, Don't know, Argentina [1991], Brazil [1991], Belarus [1990], Chile [1990], China [1990], Czech Republic [1991], India [1990], Japan [1990], South Korea [1990], Mexico [1990], Nigeria [1990], Poland [1989], Russian Federation [1990], Slovakia [1990], South Africa [1990]
Response options: 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
Response options: Missing; Unknown; Inappropiate, Not asked, Not applicable (Born in this country), No answer, Don´t know, <2 yrs, 3-5 yrs, 5-10 yrs, 10-15 yrs, >15 yrs
