| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 3 |
2%
|
| 1 | Increased | 14 |
9.2%
|
| 2 | Remained the same | 54 |
35.3%
|
| 3 | Decreased | 82 |
53.6%
|
| Sysmiss | 192 |