| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 813 |
10.3%
|
| 2 | good | 2671 |
33.9%
|
| 3 | satisfactory | 3499 |
44.4%
|
| 4 | bad | 797 |
10.1%
|
| 5 | very bad | 92 |
1.2%
|