| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 1 |
0.5%
|
| 1 | Increased | 0 |
0%
|
| 2 | Remained the same | 23 |
10.4%
|
| 3 | Decreased | 198 |
89.2%
|
| Sysmiss | 138 |