| Value | Category | Cases | |
|---|---|---|---|
| N1 | 449 | 
                                    
                                    48.9%
                                 | |
| N2 | 275 | 
                                    
                                    29.9%
                                 | |
| N3 | 123 | 
                                    
                                    13.4%
                                 | |
| N4 | 39 | 
                                    
                                    4.2%
                                 | |
| N5 | 17 | 
                                    
                                    1.8%
                                 | |
| N6 | 9 | 
                                    
                                    1%
                                 | |
| N7 | 3 | 
                                    
                                    0.3%
                                 | |
| N9 | 4 | 
                                    
                                    0.4%
                                 |