| Value | Category | Cases | |
|---|---|---|---|
| 0 | 328 | 
                                    
                                    84.5%
                                 | |
| 1 | yes | 60 | 
                                    
                                    15.5%
                                 | 
| 2 | no | 0 | 
                                    
                                    0%
                                 | 
| 77 | refuse | 0 | 
                                    
                                    0%
                                 | 
| 88 | dont know | 0 | 
                                    
                                    0%
                                 | 
| 99 | missing | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 4582 |