| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.1%
|
| 1 | Increased | 202 |
20.7%
|
| 2 | Remained the same | 526 |
53.8%
|
| 3 | Decreased | 249 |
25.5%
|
| Sysmiss | 17 |