| Value | Category |
|---|---|
| -9 | Missing |
| -8 | Don't know |
| -7 | Notappl |
| 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 in the past 12 months |
| 6 | Once but not in the past 12 months |
| 7 | Never |
| Sysmiss |