| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
3.8%
|
| -8 | Refusal (spontaneous) | 0 |
0%
|
| 1 | Yes | 6 |
7.5%
|
| 2 | No | 71 |
88.8%
|
| Sysmiss | 280 |