| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 861 |
10.9%
|
| 2 | good | 3014 |
38.3%
|
| 3 | satisfactory | 3005 |
38.2%
|
| 4 | bad | 870 |
11.1%
|
| 5 | very bad | 122 |
1.5%
|