| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Increase | 17 |
8.8%
|
| 2 | Remain the same | 143 |
74.1%
|
| 3 | Decrease | 33 |
17.1%
|
| Sysmiss | 49 |