| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 3 |
33.3%
|
| 1 | Yes | 2 |
22.2%
|
| 2 | No | 4 |
44.4%
|
| Sysmiss | 395 |