| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 2 |
1.2%
|
| -8 | Refused | 0 |
0%
|
| 1 | Increase | 4 |
2.4%
|
| 2 | Remain the same | 29 |
17.1%
|
| 3 | Decrease | 135 |
79.4%
|
| Sysmiss | 785 |