| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 48 |
7.7%
|
| -8 | Refusal (spontaneous) | 18 |
2.9%
|
| 0 | 2 |
0.3%
|
|
| 1 | 1 |
0.2%
|
|
| 2 | 13 |
2.1%
|
|
| 4 | 3 |
0.5%
|
|
| 5 | 14 |
2.3%
|
|
| 7 | 1 |
0.2%
|
|
| 10 | 5 |
0.8%
|
|
| 13 | 1 |
0.2%
|
|
| 14 | 514 |
82.6%
|
|
| 15 | 2 |
0.3%
|