| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes, always | 2021 |
31.1%
|
| 2 | yes, sometimes | 774 |
11.9%
|
| 3 | no | 620 |
9.5%
|
| 4 | not applicable | 146 | |
| Sysmiss | 2939 |