| Value | Category | Cases | |
|---|---|---|---|
| 1 | ONLY ONCE | 7800 | 
                                                                 
                                    
                                    48.7%
                                 
                                                             | 
                                                        
                    
| 2 | MORE THAN ONCE | 86 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 9 | NO RESPONSE | 1 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 8123 | 
                                                                 
                                    
                                    50.7%
                                 
                                                             |