| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 4170 | 
                                                                 
                                    
                                    17.3%
                                 
                                                             | 
                                                        
                    
| 2 | No | 18264 | 
                                                                 
                                    
                                    76%
                                 
                                                             | 
                                                        
                    
| 9 | Missing | 1602 | 
                                                                 
                                    
                                    6.7%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 491 |