| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
1.9%
|
| 0 | 342 |
95%
|
|
| 10 | 4 |
1.1%
|
|
| 14 | 1 |
0.3%
|
|
| 15 | 1 |
0.3%
|
|
| 20 | 3 |
0.8%
|
|
| 25 | 1 |
0.3%
|
|
| 40 | 1 |
0.3%
|