| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 8 |
1.3%
|
| 1 | Increase | 116 |
19%
|
| 2 | Remain the same | 173 |
28.3%
|
| 3 | Decrease | 315 |
51.5%
|