| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 4 |
2.6%
|
| 1 | Increased | 25 |
16.3%
|
| 2 | Remained the same | 94 |
61.4%
|
| 3 | Decreased | 30 |
19.6%
|
| Sysmiss | 192 |