| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 274 |
8.8%
|
| -7 | Does not apply (spontaneous) | 805 |
25.9%
|
| 1 | Increased | 115 |
3.7%
|
| 2 | Remained the Same | 1476 |
47.6%
|
| 3 | Decreased | 434 |
14%
|
| Sysmiss | 1 |