| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 285 |
14.1%
|
| 2 | Poor quality | 229 |
11.3%
|
| 3 | Average quality | 767 |
38%
|
| 4 | Good quality | 737 |
36.5%
|
| Sysmiss | 1309 |