| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 41 |
30.4%
|
|
| 1 | 59 |
43.7%
|
|
| 2 | 26 |
19.3%
|
|
| 3 | 6 |
4.4%
|
|
| 4 | 3 |
2.2%
|