| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.4%
|
| -8 | Refusal (spontaneous) | 3 |
1.3%
|
| 1 | Yes | 4 |
1.8%
|
| 2 | No | 215 |
96.4%
|
| Sysmiss | 251 |