| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
2.1%
|
| 0 | 3 |
3.1%
|
|
| 1 | 38 |
39.2%
|
|
| 2 | 30 |
30.9%
|
|
| 3 | 14 |
14.4%
|
|
| 4 | 10 |
10.3%
|