| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 4 |
3.8%
|
| -8 | Refused | 0 |
0%
|
| 1 | Increase | 4 |
3.8%
|
| 2 | Remain the same | 35 |
33.3%
|
| 3 | Decrease | 62 |
59%
|
| Sysmiss | 850 |