| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.7%
|
| 0 | 5 |
3.3%
|
|
| 1 | 9 |
6%
|
|
| 2 | 5 |
3.3%
|
|
| 3 | 1 |
0.7%
|
|
| 4 | 2 |
1.3%
|
|
| 5 | 1 |
0.7%
|
|
| 15 | 1 |
0.7%
|
|
| 20 | 1 |
0.7%
|
|
| NA | 125 |
82.8%
|