| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 3 |
5.9%
|
| -7 | Does not apply | 2 |
3.9%
|
| 1 | Yes | 18 |
35.3%
|
| 2 | No | 28 |
54.9%
|
| Sysmiss | 99 |