| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 23 |
13.1%
|
| 2 | no | 148 |
84.1%
|
| 3 | (dk) | 4 |
2.3%
|
| 4 | (ref) | 1 |
0.6%
|
| Sysmiss | 825 |