| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.7%
|
| 5 | 1 |
0.7%
|
|
| 8 | 2 |
1.3%
|
|
| 17 | 1 |
0.7%
|
|
| 20 | 1 |
0.7%
|
|
| 27 | 1 |
0.7%
|
|
| 28 | 1 |
0.7%
|
|
| NA | 143 |
94.7%
|