| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
0.6%
|
| 1 | Increased | 23 |
7.3%
|
| 2 | Remained the same | 260 |
83.1%
|
| 3 | Decreased | 28 |
8.9%
|
| Sysmiss | 48 |