| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 8 |
7.8%
|
| -7 | Does not apply | 34 |
33%
|
| 1 | Yes | 19 |
18.4%
|
| 2 | No | 42 |
40.8%
|
| Sysmiss | 47 |