| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.5%
|
| -7 | Doesn't apply (spontaneous) | 40 |
10%
|
| 0 | Below required | 13 |
3.2%
|
| 1 | As required | 298 |
74.1%
|
| 2 | Above required | 49 |
12.2%
|