| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Increased | 2 |
0.4%
|
| 2 | Remained the same | 86 |
19.2%
|
| 3 | Decreased | 359 |
80.3%
|
| Sysmiss | 154 |