| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 4 |
1.3%
|
| 1 | Yes | 63 |
20.1%
|
| 2 | No | 246 |
78.6%
|
| Sysmiss | 48 |