| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 14 |
7.7%
|
| 1 | Increased | 13 |
7.2%
|
| 2 | Remained the same | 79 |
43.6%
|
| 3 | Decreased | 75 |
41.4%
|
| Sysmiss | 178 |