| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 17 |
2.8%
|
| 1 | Increase | 114 |
19%
|
| 2 | Decrease | 149 |
24.8%
|
| 3 | Remain the same | 321 |
53.4%
|