| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 241 |
46.8%
|
|
| 1 | 183 |
35.5%
|
|
| 2 | 69 |
13.4%
|
|
| 3 | 15 |
2.9%
|
|
| 4 | 7 |
1.4%
|