| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 251 |
69.5%
|
|
| 1 | 77 |
21.3%
|
|
| 2 | 27 |
7.5%
|
|
| 3 | 6 |
1.7%
|