| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 341 | 
                                    
                                    11.4%
                                 | 
| 2 | no | 2628 | 
                                    
                                    87.6%
                                 | 
| 3 | (dk) | 26 | 
                                    
                                    0.9%
                                 | 
| 4 | (ref) | 5 | 
                                    
                                    0.2%
                                 |