| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 12 |
2%
|
| 1 | Increase | 161 |
26.9%
|
| 2 | Decrease | 269 |
44.9%
|
| 3 | Stay the same | 157 |
26.2%
|
| Sysmiss | 2 |