| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 1 |
0.4%
|
| -9 | Don't know (spontaneous) | 3 |
1.3%
|
| 1 | Increase | 20 |
8.6%
|
| 2 | Remain the same | 97 |
41.6%
|
| 3 | Decrease | 112 |
48.1%
|
| Sysmiss | 127 |