| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 454 |
8.8%
|
| 2 | good | 1803 |
34.8%
|
| 3 | satisfactory | 2186 |
42.1%
|
| 4 | bad | 686 |
13.2%
|
| 5 | very bad | 58 |
1.1%
|