| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 |
0.6%
|
| -8 | Refused | 0 |
0%
|
| 1 | Increase | 0 |
0%
|
| 2 | Remain the same | 21 |
12.8%
|
| 3 | Decrease | 142 |
86.6%
|
| Sysmiss | 791 |