| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 1 |
0.6%
|
| 1 | Increase | 3 |
1.8%
|
| 2 | Remain the same | 102 |
61.1%
|
| 3 | Decrease | 61 |
36.5%
|
| Sysmiss | 73 |