| Value | Category | Cases | |
|---|---|---|---|
| 1 | yes | 715 | 
                                                                 
                                    
                                    15%
                                 
                                                             | 
                                                        
                    
| 2 | no | 4044 | 
                                                                 
                                    
                                    85%
                                 
                                                             | 
                                                        
                    
| 77 | don't know | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 48 |