| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 28 |
3.2%
|
| 1 | Yes, fully | 163 |
18.6%
|
| 2 | Yes, partially | 22 |
2.5%
|
| 3 | No | 662 |
75.7%
|
| Sysmiss | 123 |