| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
1.9%
|
| 1 | Increase | 9 |
8.7%
|
| 2 | Remain the same | 23 |
22.3%
|
| 3 | Decrease | 69 |
67%
|
| Sysmiss | 47 |