| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.4%
|
| -8 | Refusal (spontaneous) | 3 |
4.3%
|
| 1 | Yes | 7 |
10.1%
|
| 2 | No | 58 |
84.1%
|
| Sysmiss | 289 |