| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| -7 | Does not apply (spontaneous) | 78 |
72.2%
|
| 0 | 6 |
5.6%
|
|
| 25 | 1 |
0.9%
|
|
| 30 | 1 |
0.9%
|
|
| 90 | 1 |
0.9%
|
|
| 100 | 21 |
19.4%
|
|
| Sysmiss | 424 |