Grade compared to modal grade in country

Country of Birth National Categories- Self

One of the other former Yugoslav republics (HRV)
African country with Portuguese as the official language
Another State of the Gulf Cooperation Council (ARE)
In other CIS countries (except Kazakhstan) (KAZ)
Former Yugoslavia (Bosnia-Herzegovina, Croatia, Kosovo, Macedonia, Montenegro, Serbia, Slo
Another country within the European Union (ITA)
One of the other former Yugoslav republics (SRB)
A Sub-Saharan country (Africa excl. Maghreb)
Another province in mainland China (QCH)
Other country in Western Europe (e.g. Belgium, Spain, Sweden)
Other Country outside Latin America (CHL)
Hong Kong, Macau, Taiwan (Chinese Taipei)
Other country in Eastern Europe (e.g. Bulgaria, Romania, Russia)
Province or municipality in which test is being taken (China)
Other country in Asia (e.g. Afghanistan, China, India)
A European country that is not a member of the European Union
Other country in Africa (e.g. Eritrea, Ghana, Somalia)
An Eastern European country outside the EU
Other country in Latin America (e.g. Argentina, Brazil, Mexico)
Another country within the European Union (MLT)

Country of Birth National Categories- Mother

Country of Birth National Categories- Father

Ethnic minority languages (eg: Tay language, Nung language, Hmong language) (VNM)
Minority languages Bulgarian dialects (BGR)
Serbian of a yekavian variant or Montenegrin
Other National dialects or languages (ROU)
Other former Yugoslavian languages (SVN)
Dialect from Ticino or an Italian Region
Other languages spoken in Argentina (quechua, guaran, mapuche)
Another language officially accepted in Italy (Ladino in Alto Adige and French in Val d'Aosta)

Index highest parental education in years of schooling

Mother’s Education - alternate definition (ISCED)

Father’s Education - alternate definition (ISCED)

Highest Education of parents - alternate definition (ISCED)

Index highest parental education (international years of schooling scale)

Index highest parental occupational status