| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
2.4%
|
| 1 | Increased | 9 |
10.7%
|
| 2 | Remained the same | 30 |
35.7%
|
| 3 | Decreased | 43 |
51.2%
|
| Sysmiss | 275 |