| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Increased | 6 |
9.1%
|
| 2 | Remained the same | 57 |
86.4%
|
| 3 | Decreased | 3 |
4.5%
|
| Sysmiss | 694 |