| Value | Category | Cases | |
|---|---|---|---|
| N1 | 2804 | 
                                    
                                    69.2%
                                 | |
| N2 | 701 | 
                                    
                                    17.3%
                                 | |
| N3 | 337 | 
                                    
                                    8.3%
                                 | |
| N4 | 104 | 
                                    
                                    2.6%
                                 | |
| N5 | 72 | 
                                    
                                    1.8%
                                 | |
| N6 | 14 | 
                                    
                                    0.3%
                                 | |
| N7 | 20 | 
                                    
                                    0.5%
                                 |