| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 472 |
9.1%
|
| 2 | good | 1888 |
36.4%
|
| 3 | satisfactory | 2054 |
39.6%
|
| 4 | bad | 711 |
13.7%
|
| 5 | very bad | 59 |
1.1%
|