| Value | Category | Cases | |
|---|---|---|---|
| -99 | 75 |
26%
|
|
| 1 | Every few days | 22 |
7.6%
|
| 2 | Every few weeks | 44 |
15.3%
|
| 3 | Every few months | 68 |
23.6%
|
| 4 | Not at all | 79 |
27.4%
|
| Sysmiss | 87 |