| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 25 |
25.8%
|
| 1 | 38 |
39.2%
|
|
| 2 | 27 |
27.8%
|
|
| 3 | 4 |
4.1%
|
|
| 4 | 3 |
3.1%
|