| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 | 1 | 
                                    
                                    0.1%
                                 | 
| 2 | O1 | 302 | 
                                    
                                    21.7%
                                 | 
| 3 | O2 | 272 | 
                                    
                                    19.5%
                                 | 
| 4 | O3 | 5 | 
                                    
                                    0.4%
                                 | 
| 5 | O4 | 2 | 
                                    
                                    0.1%
                                 | 
| Missing value | 811 | 
                                    
                                    58.2%
                                 |