| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 5 |
3.7%
|
|
| 1 | 44 |
32.6%
|
|
| 2 | 55 |
40.7%
|
|
| 3 | 24 |
17.8%
|
|
| 4 | 7 |
5.2%
|