| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
1.9%
|
| 1 | Increase | 217 |
60.3%
|
| 2 | Decrease | 47 |
13.1%
|
| 3 | Stay the same | 89 |
24.7%
|