| Value | Category | Cases | |
|---|---|---|---|
| 1 | Improvement | 154 |
21.2%
|
| 2 | No change | 460 |
63.2%
|
| 3 | Deterioration | 9 |
1.2%
|
| 4 | Neither existed earlier nor existing now | 100 |
13.7%
|
| 9 | Invalid | 5 |
0.7%
|