| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1%
|
| -8 | Refusal (spontaneous) | 5 |
2.4%
|
| 1 | Yes | 27 |
12.9%
|
| 2 | No | 176 |
83.8%
|
| Sysmiss | 301 |