| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | Increase | 7 |
4.2%
|
| 2 | Remain the same | 56 |
33.5%
|
| 3 | Decrease | 104 |
62.3%
|
| Sysmiss | 73 |