| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 23 |
5.1%
|
| 2 | no | 414 |
92.4%
|
| 3 | (dk) | 11 |
2.5%
|
| 4 | (ref) | 0 |
0%
|
| Sysmiss | 552 |