| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Increased | 2 |
5.9%
|
| 2 | Remained the same | 26 |
76.5%
|
| 3 | Decreased | 6 |
17.6%
|
| Sysmiss | 206 |