Interviewer instructions
Columns (4) to (6): Principal industry-occupation: Columns (4) to (6) will be filled-in for those who are "working", i.e., those with any one of codes 11, 12, 21, 31, 41, or 51 in column (3). The description of the industry-occupation relevant to the type of economic activity pursued by the person in the status recorded in column (3) will be given in column (4). The corresponding 5-digit industry code (NIC-2004) and the 3-digit occupation code (NCO-2004) will be entered in columns (5) and (6), respectively. In case, two or more industry-occupation combinations corresponding to the status code given in column (3) have been reported by a person, the principal industry-occupation will be the one in which relatively more time has been spent during the preceding 365 days by the person.