| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
0.5%
|
| -7 | Does not apply (spontaneous) | 36 |
6.5%
|
| 0 | Below required | 67 |
12.1%
|
| 1 | As required | 338 |
61%
|
| 2 | Above required | 110 |
19.9%
|