| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
1%
|
| -7 | Not applicable (spontaneous) | 23 |
1.4%
|
| 1 | Yes | 533 |
32.5%
|
| 2 | No | 1067 |
65.1%
|