| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 414 | 
                                    
                                    13.8%
                                 | 
| 2 | no | 2566 | 
                                    
                                    85.5%
                                 | 
| 3 | (dk) | 16 | 
                                    
                                    0.5%
                                 | 
| 4 | (ref) | 4 | 
                                    
                                    0.1%
                                 |