| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
3.3%
|
| 1 | 5 |
4.2%
|
|
| 2 | 13 |
10.8%
|
|
| 3 | 21 |
17.5%
|
|
| 4 | 33 |
27.5%
|
|
| 5 | 17 |
14.2%
|
|
| 6 | 19 |
15.8%
|
|
| 7 | 4 |
3.3%
|
|
| 8 | 4 |
3.3%
|