| Value | Category | Cases | |
|---|---|---|---|
| 2 | Grade 2 | 19 |
0.8%
|
| 3 | Grade 3 | 543 |
22.6%
|
| 4 | Grade 4 | 1839 |
76.5%
|
| 5 | Grade 5 | 4 |
0.2%
|
| Sysmiss | 922 |