| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 10 |
1.8%
|
| 1 | 297 |
53.6%
|
|
| 2 | 157 |
28.3%
|
|
| 3 | 57 |
10.3%
|
|
| 4 | 22 |
4%
|
|
| 5 | 8 |
1.4%
|
|
| 6 | 1 |
0.2%
|
|
| 7 | 1 |
0.2%
|
|
| 8 | 1 |
0.2%
|