| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.4%
|
| -7 | Does not apply (spontaneous) | 69 |
13.3%
|
| 0 | Below required | 7 |
1.3%
|
| 1 | As required | 269 |
51.8%
|
| 2 | Above required | 172 |
33.1%
|