| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Increased | 31 |
8.7%
|
| 2 | Remained the same | 143 |
39.9%
|
| 3 | Decreased | 184 |
51.4%
|
| Sysmiss | 402 |