| Value | Category | Cases | |
|---|---|---|---|
| N1 | 1272 | 
                                    
                                    43.1%
                                 | |
| N2 | 1031 | 
                                    
                                    34.9%
                                 | |
| N3 | 401 | 
                                    
                                    13.6%
                                 | |
| N4 | 151 | 
                                    
                                    5.1%
                                 | |
| N5 | 48 | 
                                    
                                    1.6%
                                 | |
| N6 | 27 | 
                                    
                                    0.9%
                                 | |
| N7 | 13 | 
                                    
                                    0.4%
                                 | |
| N8 | 6 | 
                                    
                                    0.2%
                                 | |
| N9 | 2 | 
                                    
                                    0.1%
                                 |