| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
2.2%
|
| 0 | 44 |
32.6%
|
|
| 1 | 72 |
53.3%
|
|
| 2 | 14 |
10.4%
|
|
| 3 | 2 |
1.5%
|