| Value | Category | Cases | |
|---|---|---|---|
| 1 | high quality | 639 |
9.4%
|
| 2 | good | 2224 |
32.6%
|
| 3 | satisfactory | 2903 |
42.6%
|
| 4 | bad | 852 |
12.5%
|
| 5 | very bad | 198 |
2.9%
|