| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
0.6%
|
| 1 | Increased | 39 |
12.5%
|
| 2 | Remained the same | 137 |
43.8%
|
| 3 | Decreased | 135 |
43.1%
|
| Sysmiss | 48 |