| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
8.7%
|
| -8 | Refusal (spontaneous) | 0 |
0%
|
| 1 | Yes | 3 |
13%
|
| 2 | No | 18 |
78.3%
|
| Sysmiss | 129 |