| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, at least once | 530 | 
                                                                 
                                    
                                    17.7%
                                 
                                                             | 
                                                        
                    
| 2 | No, always sufficient | 2450 | 
                                                                 
                                    
                                    82%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 7 | 
                                                                 
                                    
                                    0.2%
                                 
                                                             |