| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't Know (spontaneous) | 1 |
0.3%
|
| -8 | Refusal (spontaneous) | 2 |
0.6%
|
| 1 | 24 |
6.7%
|
|
| 2 | 330 |
92.4%
|