| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 5 |
1.9%
|
| 2 | no | 251 |
97.3%
|
| 3 | (dk) | 1 |
0.4%
|
| 4 | (ref) | 1 |
0.4%
|
| Sysmiss | 745 |