| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 1 |
0.5%
|
| 1 | Increased | 12 |
5.4%
|
| 2 | Remained the same | 107 |
48.2%
|
| 3 | Decreased | 102 |
45.9%
|
| Sysmiss | 138 |