| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 43 |
6.9%
|
| -8 | Refusal (spontaneous) | 14 |
2.3%
|
| 0 | 3 |
0.5%
|
|
| 1 | 1 |
0.2%
|
|
| 2 | 9 |
1.4%
|
|
| 3 | 2 |
0.3%
|
|
| 4 | 1 |
0.2%
|
|
| 5 | 11 |
1.8%
|
|
| 8 | 1 |
0.2%
|
|
| 10 | 12 |
1.9%
|
|
| 14 | 46 |
7.4%
|
|
| 15 | 122 |
19.6%
|
|
| 18 | 1 |
0.2%
|
|
| 20 | 1 |
0.2%
|
|
| 22 | 351 |
56.4%
|
|
| 30 | 1 |
0.2%
|
|
| 40 | 3 |
0.5%
|