| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Increase | 11 |
5.7%
|
| 2 | Remain the same | 40 |
20.7%
|
| 3 | Decrease | 142 |
73.6%
|
| Sysmiss | 49 |