| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.2%
|
| 1 | Yes, fully | 109 |
18.7%
|
| 2 | Yes, partially | 93 |
16%
|
| 3 | No | 379 |
65.1%
|
| Sysmiss | 850 |