| Value | Category | Cases | |
|---|---|---|---|
| -99 | 14 |
9.9%
|
|
| 1 | Every few days | 28 |
19.7%
|
| 2 | Every few weeks | 29 |
20.4%
|
| 3 | Every few months | 38 |
26.8%
|
| 4 | Not at all | 33 |
23.2%
|
| Sysmiss | 25 |