| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
0.2%
|
| -7 | Does not apply (spontaneous) | 0 |
0%
|
| 1 | Increase | 56 |
5.6%
|
| 2 | Remain the same | 288 |
28.9%
|
| 3 | Decrease | 652 |
65.3%
|