| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 9 |
5%
|
| 1 | Yes | 57 |
31.5%
|
| 2 | No | 115 |
63.5%
|
| Sysmiss | 178 |