| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 797 |
10.1%
|
| 2 | good | 3112 |
39.5%
|
| 3 | satisfactory | 3113 |
39.5%
|
| 4 | bad | 747 |
9.5%
|
| 5 | very bad | 103 |
1.3%
|