| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 10 |
2.5%
|
| 2 | no | 385 |
95.8%
|
| 3 | (dk) | 3 |
0.7%
|
| 4 | (ref) | 4 |
1%
|
| Sysmiss | 598 |