| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than basic | 3959 | 
                                    
                                    19.5%
                                 | 
| 2 | Basic | 3582 | 
                                    
                                    17.7%
                                 | 
| 3 | Secondary | 6800 | 
                                    
                                    33.6%
                                 | 
| 4 | Higher education | 5915 | 
                                    
                                    29.2%
                                 |