| Value | Category | Cases | |
|---|---|---|---|
| -9 | don't know | 1 |
0.8%
|
| -8 | refusal | 3 |
2.3%
|
| 1 | yes | 13 |
9.8%
|
| 2 | no | 115 |
87.1%
|
| Sysmiss | 954 |