| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 3 |
2.2%
|
| 1 | Increase | 32 |
23.5%
|
| 2 | Remain the same | 97 |
71.3%
|
| 3 | Decrease | 4 |
2.9%
|
| Sysmiss | 14 |