| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 750 |
9.5%
|
| 2 | good | 2712 |
34.5%
|
| 3 | satisfactory | 3495 |
44.4%
|
| 4 | bad | 754 |
9.6%
|
| 5 | very bad | 161 |
2%
|