| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 208 |
10.3%
|
| 2 | Poor quality | 322 |
16%
|
| 3 | Average quality | 835 |
41.4%
|
| 4 | Good quality | 653 |
32.4%
|
| Sysmiss | 1309 |