| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 976 |
88.4%
|
| 2 | Mild | 67 |
6.1%
|
| 3 | Moderate | 41 |
3.7%
|
| 4 | Severe | 16 |
1.4%
|
| 5 | Extreme | 4 |
0.4%
|
| Sysmiss | 3313 |