| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
2.7%
|
| -8 | Refusal (spontaneous) | 0 |
0%
|
| 1 | Yes | 3 |
1.6%
|
| 2 | No | 179 |
95.7%
|
| Sysmiss | 2448 |