| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
2.2%
|
| 1 | Yes | 47 |
51.1%
|
| 2 | No | 43 |
46.7%
|
| Sysmiss | 1004 |