| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 62 |
12.4%
|
| 1 | Yes | 230 |
46.2%
|
| 2 | No | 206 |
41.4%
|
| Sysmiss | 103 |