| Value | Category |
|---|---|
| -5 | -5. wild code |
| -4 | -4. unexp. blank |
| -3 | -3. na |
| -2 | -2. refused |
| -1 | -1. dont know |
| 1 | 1. never |
| 2 | 2. < once/year |
| 3 | 3. about once/year |
| 4 | 4. several times/yr |
| 5 | 5. about once/mnth |
| 6 | 6. 2-3 times/mnth |
| 7 | 7. every week |
| 8 | 8. several times/wk |
| 9 | 9. every day |