| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 457 |
8.8%
|
| 2 | good | 1886 |
36.4%
|
| 3 | satisfactory | 2170 |
41.8%
|
| 4 | bad | 606 |
11.7%
|
| 5 | very bad | 68 |
1.3%
|