| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 290 | 
                                    
                                    9.7%
                                 | 
| 2 | no | 2695 | 
                                    
                                    89.8%
                                 | 
| 3 | (dk) | 14 | 
                                    
                                    0.5%
                                 | 
| 4 | (ref) | 1 | 
                                    
                                    0%
                                 |