| Value | Category | Cases | |
|---|---|---|---|
| -99 | 72 |
25.2%
|
|
| 1 | Every few days | 24 |
8.4%
|
| 2 | Every few weeks | 32 |
11.2%
|
| 3 | Every few months | 44 |
15.4%
|
| 4 | Not at all | 114 |
39.9%
|
| Sysmiss | 89 |