| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 62 |
23.4%
|
| 1 | Yes | 58 |
21.9%
|
| 2 | No | 145 |
54.7%
|
| Sysmiss | 94 |