| Population | Singaporean Nationals Aged 20 and Over | 
|---|---|
| Sample Size | 1,037 | 
| Sampling Method | Stratified Two-stage Probability Sampling Method & Birth Method | 
| Survey Method | Face-to-Face Interviewing Method | 
| Research Term | 2004/12/21-2005/1/24 | 
| Completed Questionnaires | 33% |