| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 162 | 
                                    
                                    25.8%
                                 | 
| 2 | no | 444 | 
                                    
                                    70.7%
                                 | 
| 3 | (dk) | 14 | 
                                    
                                    2.2%
                                 | 
| 4 | (ref) | 8 | 
                                    
                                    1.3%
                                 | 
| Sysmiss | 2372 |