| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 180 |
17.4%
|
| -7 | Does not apply (spontaneous) | 10 |
1%
|
| 1 | Yes | 440 |
42.6%
|
| 2 | No | 402 |
39%
|
| Sysmiss | 608 |