| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 23 |
2.6%
|
| 1 | Yes, fully | 177 |
20.2%
|
| 2 | Yes, partially | 63 |
7.2%
|
| 3 | No | 612 |
69.9%
|
| Sysmiss | 123 |