| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
4.4%
|
| -8 | Refusal (spontaneous) | 1 |
0.9%
|
| -7 | Does not apply (spontaneous) | 2 |
1.8%
|
| 1 | Yes | 2 |
1.8%
|
| 2 | No | 104 |
91.2%
|
| Sysmiss | 1086 |