| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 234 | 
                                    
                                    22.5%
                                 | 
| 2 | no | 800 | 
                                    
                                    77.1%
                                 | 
| 3 | (dk) | 3 | 
                                    
                                    0.3%
                                 | 
| 4 | (ref) | 1 | 
                                    
                                    0.1%
                                 | 
| Sysmiss | 1962 |