| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
2.7%
|
| -7 | Does not apply (spontaneous) | 30 |
13.7%
|
| 0 | Below required | 34 |
15.5%
|
| 1 | As required | 135 |
61.6%
|
| 2 | Above required | 14 |
6.4%
|
| Sysmiss | 335 |