| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 6 |
1.1%
|
| -7 | Does not apply (spontaneous) | 32 |
5.8%
|
| 0 | Below required | 47 |
8.5%
|
| 1 | As required | 365 |
65.9%
|
| 2 | Above required | 104 |
18.8%
|