| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 258 |
4.8%
|
| 0 | 148 |
2.8%
|
|
| 1 | 3426 |
64%
|
|
| 2 | 1133 |
21.2%
|
|
| 3 | 230 |
4.3%
|
|
| 4 | 73 |
1.4%
|
|
| 5 | 47 |
0.9%
|
|
| 6 | 14 |
0.3%
|
|
| 7 | 5 |
0.1%
|
|
| 8 | 8 |
0.1%
|
|
| 9 | 1 |
0%
|
|
| 10 | 4 |
0.1%
|
|
| 12 | 1 |
0%
|
|
| 13 | 1 |
0%
|
|
| 15 | 2 |
0%
|
|
| 30 | 1 |
0%
|