| Value | Category | Cases | |
|---|---|---|---|
| 1 | O1 | 75 | 
                                    
                                    13.8%
                                 | 
| 2 | O2 | 172 | 
                                    
                                    31.6%
                                 | 
| 3 | O4 | 7 | 
                                    
                                    1.3%
                                 | 
| Missing value | 291 | 
                                    
                                    53.4%
                                 |