| Value | Category | Cases | |
|---|---|---|---|
| N1 | 140 | 
                                    
                                    43.2%
                                 | |
| N2 | 110 | 
                                    
                                    34%
                                 | |
| N3 | 44 | 
                                    
                                    13.6%
                                 | |
| N4 | 14 | 
                                    
                                    4.3%
                                 | |
| N5 | 6 | 
                                    
                                    1.9%
                                 | |
| N6 | 6 | 
                                    
                                    1.9%
                                 | |
| N8 | 2 | 
                                    
                                    0.6%
                                 | |
| N9 | 2 | 
                                    
                                    0.6%
                                 |