| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 151 |
30.3%
|
| 1 | Yes | 47 |
9.4%
|
| 2 | No | 300 |
60.2%
|
| Sysmiss | 103 |