Korean national opinion poll 1991

Based on the multi-stage systematic clustering probability method, the sample was drawn from 'Do' (or 'Tukbyolshi'/'Jikhalshi'), 'Shi'/'Kun', 'Ku', 'Eop'/'Myon', 'Dong', and 'Ri', pre-decided for the nine provinces, six 'Tukbyolshi' and 'Jikhalshi', and so on, and then for the practical convenience of the interview the number of 5-7 respondents were drawn from the administrative divisions of 'Eop', 'Myon', or 'Dong'. On the basis of the number of inhabitants, sampling was drawn from 'Dong' in city area and 'Eop' and 'Myon' in the non-city area. Followingly, 'Tong' and 'Ri' were systematically drawn from the city area and non-city area, respectively. The house of administrative head of 'Tong' and 'Ri' was the starting point. To the right of the starting point the first sample was interviewed, and the next and so on. At interview, all adults of the family were asked to register to the interviewer and then on the basis of sampling principle and in consideration of gender and age a interview person was decided.