| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
2.4%
|
| -8 | Refusal (spontaneous) | 1 |
0.4%
|
| -7 | Does not apply (spontaneous) | 7 |
2.7%
|
| 1 | Yes | 45 |
17.6%
|
| 2 | No | 196 |
76.9%
|
| Sysmiss | 746 |