| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
1.5%
|
| 1 | Increase | 7 |
5.1%
|
| 2 | Remain the same | 34 |
25%
|
| 3 | Decrease | 93 |
68.4%
|
| Sysmiss | 14 |