| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 797 |
10.1%
|
| 2 | good | 2668 |
33.9%
|
| 3 | satisfactory | 3395 |
43.1%
|
| 4 | bad | 830 |
10.5%
|
| 5 | very bad | 182 |
2.3%
|