| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very high quality | 551 |
16.9%
|
| 2 | Good quality | 1216 |
37.3%
|
| 3 | Acceptable quality | 913 |
28%
|
| 4 | Poor quality | 195 |
6%
|
| 5 | Very poor quality | 131 |
4%
|
| 8 | Uncertain or Don't know | 254 |
7.8%
|
| Sysmiss | 61 |