| Value | Category | Cases | |
|---|---|---|---|
| 1 | Every few days | 12 |
5.9%
|
| 2 | Every few weeks | 10 |
4.9%
|
| 3 | Every few months | 39 |
19.1%
|
| 4 | Not at all | 143 |
70.1%
|
| -99 | 16 | ||
| Sysmiss | 34 |