| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 19 |
3.7%
|
| 1 | Yes | 250 |
48.6%
|
| 2 | No | 245 |
47.7%
|
| Sysmiss | 300 |