| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 28 |
3.2%
|
| 1 | Yes, fully | 130 |
14.9%
|
| 2 | Yes, partially | 7 |
0.8%
|
| 3 | No | 710 |
81.1%
|
| Sysmiss | 123 |