| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes, the entire questionnaire | 151 | 
                                                                 
                                    
                                    2.2%
                                 
                                                             | 
                                                        
                    
| 2 | Yes, parts of the questionnaire | 25 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    
| 3 | No, not used | 6824 | 
                                                                 
                                    
                                    97.5%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1533 |