| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Increased | 10 |
1.8%
|
| 2 | Remained the same | 490 |
88.6%
|
| 3 | Decreased | 53 |
9.6%
|
| Sysmiss | 252 |