| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 275 | 
                                    
                                    9.2%
                                 | 
| 2 | no | 2711 | 
                                    
                                    90.4%
                                 | 
| 3 | (dk) | 11 | 
                                    
                                    0.4%
                                 | 
| 4 | (ref) | 3 | 
                                    
                                    0.1%
                                 |