| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Yes | 103 |
30.1%
|
| 2 | No | 239 |
69.9%
|
| Sysmiss | 62 |