| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes, always | 676 |
10.4%
|
| 2 | yes, sometimes | 324 |
5%
|
| 3 | no | 423 |
6.5%
|
| 4 | not applicable | 2138 | |
| Sysmiss | 2939 |