| Value | Category | Cases | |
|---|---|---|---|
| 0 | NEVER | 74 | 
                                                                 
                                    
                                    39.2%
                                 
                                                             | 
                                                        
                    
| 1 | PRIMARY | 70 | 
                                                                 
                                    
                                    37%
                                 
                                                             | 
                                                        
                    
| 2 | SECONDARY | 25 | 
                                                                 
                                    
                                    13.2%
                                 
                                                             | 
                                                        
                    
| 3 | TERTIARY | 20 | 
                                                                 
                                    
                                    10.6%
                                 
                                                             |