| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
5.3%
|
| 1 | Increased | 5 |
13.2%
|
| 2 | Remained the same | 10 |
26.3%
|
| 3 | Decreased | 21 |
55.3%
|
| Sysmiss | 307 |