| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 870 |
11.1%
|
| 2 | good | 3015 |
38.3%
|
| 3 | satisfactory | 3084 |
39.2%
|
| 4 | bad | 789 |
10%
|
| 5 | very bad | 114 |
1.4%
|