| Value | Category | Cases | |
|---|---|---|---|
| 1 | Primary or none | 5287 | 
                                    
                                    33.8%
                                 | 
| 2 | Secondary | 7167 | 
                                    
                                    45.8%
                                 | 
| 3 | Higher | 3181 | 
                                    
                                    20.3%
                                 |