| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 Superior quality | 31709 |
27.8%
|
| 2 | 2 Inferior quality | 53742 |
47.2%
|
| 3 | 3 The same quality | 16949 |
14.9%
|
| 4 | 4 (DK) | 11117 |
9.8%
|
| 5 | 5 (Refused) | 424 |
0.4%
|
| Sysmiss | 985342 |