| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 20 |
12.3%
|
|
| 1 | 77 |
47.2%
|
|
| 2 | 58 |
35.6%
|
|
| 3 | 3 |
1.8%
|
|
| 5 | 2 |
1.2%
|
|
| 10 | 2 |
1.2%
|
|
| 15 | 1 |
0.6%
|