| Value | Category | Cases | |
|---|---|---|---|
| N1 | 202 | 
                                    
                                    30.6%
                                 | |
| N2 | 216 | 
                                    
                                    32.7%
                                 | |
| N3 | 133 | 
                                    
                                    20.2%
                                 | |
| N4 | 61 | 
                                    
                                    9.2%
                                 | |
| N5 | 34 | 
                                    
                                    5.2%
                                 | |
| N6 | 5 | 
                                    
                                    0.8%
                                 | |
| N8 | 8 | 
                                    
                                    1.2%
                                 | |
| N9 | 1 | 
                                    
                                    0.2%
                                 |