| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 6 |
0.6%
|
| 2 | Mild | 10 |
1%
|
| 3 | Moderate | 28 |
2.8%
|
| 4 | Severe | 258 |
26.1%
|
| 5 | Extreme | 685 |
69.4%
|
| Sysmiss | 2951 |