| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 197 | 
                                    
                                    19.7%
                                 | 
| 2 | no | 797 | 
                                    
                                    79.7%
                                 | 
| 3 | (dk) | 1 | 
                                    
                                    0.1%
                                 | 
| 4 | (ref) | 5 | 
                                    
                                    0.5%
                                 |