| Value | Category | Cases | |
|---|---|---|---|
| 1 | Grade 1 | 563 |
31.4%
|
| 2 | Grade 2 | 518 |
28.9%
|
| 3 | Grade 3 | 709 |
39.6%
|
| 4 | Grade 4 | 1 |
0.1%
|
| 5 | Ungraded or other grade | 0 |
0%
|
| Sysmiss | 11 |