| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 73 |
54.1%
|
|
| 1 | 45 |
33.3%
|
|
| 2 | 14 |
10.4%
|
|
| 3 | 3 |
2.2%
|