| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
0.4%
|
| 1 | Increase | 81 |
15.3%
|
| 2 | Remain the same | 175 |
33%
|
| 3 | Decrease | 272 |
51.3%
|
| Sysmiss | 70 |