| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 3 |
1.1%
|
| 1 | Increase | 35 |
13.2%
|
| 2 | Remain the same | 94 |
35.5%
|
| 3 | Decrease | 133 |
50.2%
|
| Sysmiss | 94 |