| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | 4 |
3.6%
|
|
| 2 | 20 |
18%
|
|
| 3 | 38 |
34.2%
|
|
| 4 | 49 |
44.1%
|