| Value | Category | Cases | |
|---|---|---|---|
| 0 | 4 | 
                                    
                                    0.1%
                                 | |
| 1 | 121 | 
                                    
                                    3.8%
                                 | |
| 2 | 42 | 
                                    
                                    1.3%
                                 | |
| 3 | 12 | 
                                    
                                    0.4%
                                 | |
| 4 | 2 | 
                                    
                                    0.1%
                                 | |
| 8 | 1 | 
                                    
                                    0%
                                 | |
| Missing value | 3001 | 
                                    
                                    94.3%
                                 |