| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 3 |
5.9%
|
| 1 | Increase | 0 |
0%
|
| 2 | Remain the same | 5 |
9.8%
|
| 3 | Decrease | 43 |
84.3%
|
| Sysmiss | 99 |