| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 3 |
6%
|
| -8 | Refused | 0 |
0%
|
| 1 | Increase | 34 |
68%
|
| 2 | Remain the same | 11 |
22%
|
| 3 | Decrease | 2 |
4%
|
| Sysmiss | 1945 |