| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 1803 |
20.7%
|
| 2 | no | 6830 |
78.3%
|
| 3 | (dk) | 61 |
0.7%
|
| 4 | (ref) | 30 |
0.3%
|
| Sysmiss | 146199 |