| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
7.2%
|
| 1 | 72 |
74.2%
|
|
| 2 | 14 |
14.4%
|
|
| 3 | 3 |
3.1%
|
|
| 5 | 1 |
1%
|