| Value | Category | Cases | |
|---|---|---|---|
| 0 | 40 | 
                                    
                                    14.8%
                                 | |
| 1 | 210 | 
                                    
                                    77.8%
                                 | |
| 2 | 13 | 
                                    
                                    4.8%
                                 | |
| 5 | 2 | 
                                    
                                    0.7%
                                 | |
| 7 | 5 | 
                                    
                                    1.9%
                                 | |
| Missing value | 3073 |