| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Increase | 7 |
6.9%
|
| 2 | Remain the same | 33 |
32.7%
|
| 3 | Decrease | 61 |
60.4%
|
| Sysmiss | 52 |