| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 566 |
18.2%
|
| 1 | Lower | 1055 |
34%
|
| 2 | Roughly the same | 1294 |
41.7%
|
| 3 | Higher | 190 |
6.1%
|