Nach dem in der SER verwendeten Klassifizierungssystem werden die Haushalte auf der Grundlage der Haupteinkommensquelle des gesamten Haushalts sozioökonomischen Gruppen zugeordnet. ###>In 1988 the number of agricultural households identified using the criterion that farming was the main source of the entire household was 82 000, in contrast with 87 000 where farming was the main income of the household reference person (household member with the largest income).