| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
3.3%
|
| 1 | 11 |
7.3%
|
|
| 2 | 4 |
2.6%
|
|
| 3 | 1 |
0.7%
|
|
| NA | 130 |
86.1%
|