| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 844 |
10.7%
|
| 2 | good | 2652 |
33.7%
|
| 3 | satisfactory | 3417 |
43.4%
|
| 4 | bad | 856 |
10.9%
|
| 5 | very bad | 103 |
1.3%
|