| Value | Category | Cases | |
|---|---|---|---|
| -99 | 4 |
1%
|
|
| 1 | Every few days | 28 |
7.1%
|
| 2 | Every few weeks | 44 |
11.1%
|
| 3 | Every few months | 174 |
44.1%
|
| 4 | Not at all | 64 |
16.2%
|
| Sysmiss | 81 |
20.5%
|