| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 4 |
2.4%
|
| 1 | Increase | 25 |
15%
|
| 2 | Remain the same | 68 |
40.7%
|
| 3 | Decrease | 70 |
41.9%
|
| Sysmiss | 73 |