| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 | 50 |
3.2%
|
| 2 | O1 | 490 |
31.2%
|
| 3 | O2 | 176 |
11.2%
|
| 4 | O3 | 34 |
2.2%
|
| Missing value | 821 |
52.3%
|