| Value | Category | Cases | |
|---|---|---|---|
| 0 | 179 | 
                                    
                                    3.7%
                                 | |
| 1 | 264 | 
                                    
                                    5.5%
                                 | |
| 2 | 107 | 
                                    
                                    2.2%
                                 | |
| 3 | 23 | 
                                    
                                    0.5%
                                 | |
| 4 | 4 | 
                                    
                                    0.1%
                                 | |
| 5 | 1 | 
                                    
                                    0%
                                 | |
| 6 | 1 | 
                                    
                                    0%
                                 | |
| 8 | 1 | 
                                    
                                    0%
                                 | |
| Missing value | 4230 | 
                                    
                                    87.9%
                                 |