| Value | Category |
|---|---|
| 1 | Many times in the past 12 months |
| 2 | Few times in the past 12 months |
| 3 | Once in the past 12 months |
| 4 | Frequently but not in the past 12 months |
| 5 | Rarely but not in the past 12 months |
| 6 | Once but not in the past 12 months |
| 7 | Never |
| 11 | .N |
| Sysmiss |