| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 153 | 
                                    
                                    6.6%
                                 | 
| 2 | no | 2152 | 
                                    
                                    92.4%
                                 | 
| 3 | (dk) | 23 | 
                                    
                                    1%
                                 | 
| 4 | (ref) | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 672 |