| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 1164 | 
                                                                 
                                    
                                    10.7%
                                 
                                                             | 
                                                        
                    
| 2 | 1-3 times | 6943 | 
                                                                 
                                    
                                    63.7%
                                 
                                                             | 
                                                        
                    
| 3 | 3+ times | 2796 | 
                                                                 
                                    
                                    25.6%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 13 |