| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 10 |
2%
|
| 1 | Increase | 9 |
1.8%
|
| 2 | Remain the same | 214 |
43%
|
| 3 | Decrease | 265 |
53.2%
|
| Sysmiss | 103 |