| Value | Category | Cases | |
|---|---|---|---|
| 1 | Most of them | 6 | 
                                                                 
                                    
                                    12.2%
                                 
                                                             | 
                                                        
                    
| 2 | Some of them | 7 | 
                                                                 
                                    
                                    14.3%
                                 
                                                             | 
                                                        
                    
| 3 | Very few | 9 | 
                                                                 
                                    
                                    18.4%
                                 
                                                             | 
                                                        
                    
| 4 | No one | 27 | 
                                                                 
                                    
                                    55.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 50 |