| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 5 |
3.8%
|
| 1 | Yes | 84 |
64.6%
|
| 2 | No | 41 |
31.5%
|
| Sysmiss | 228 |