| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 442 |
8.5%
|
| 2 | good | 2038 |
39.3%
|
| 3 | satisfactory | 2034 |
39.2%
|
| 4 | bad | 613 |
11.8%
|
| 5 | very bad | 57 |
1.1%
|