| Value | Category |
|---|---|
| 0 | Never |
| 1 | Rarely (once or twice in the past 30 days) |
| 2 | Sometimes (three to ten times in the past 30 days) |
| 3 | Often (more than ten times in the past 30 days) |
| 4 | Always (every day) |
| 777 | Respondent does not want to respond |
| 888 | Not applicable |
| 999 | Does not know the response |
| Sysmiss |