| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.3%
|
| 0 | 17 |
11.3%
|
|
| 1 | 3 |
2%
|
|
| 2 | 2 |
1.3%
|
|
| 15 | 1 |
0.7%
|
|
| 30 | 1 |
0.7%
|
|
| NA | 125 |
82.8%
|