| Value | Category | Cases | |
|---|---|---|---|
| -7 | Refusal (spontaneous) | 633 |
21.4%
|
| 0 | 257 |
8.7%
|
|
| 1 | 958 |
32.4%
|
|
| 2 | 674 |
22.8%
|
|
| 3 | 353 |
11.9%
|
|
| 4 | 80 |
2.7%
|