| Value | Category | Cases | |
|---|---|---|---|
| 1 | ONLY ONCE | 1441 | 
                                                                 
                                    
                                    27.6%
                                 
                                                             | 
                                                        
                    
| 2 | MORE THAN ONCE | 514 | 
                                                                 
                                    
                                    9.8%
                                 
                                                             | 
                                                        
                    
| 9 | NO RESPONSE | 2 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 3269 | 
                                                                 
                                    
                                    62.6%
                                 
                                                             |