| Value | Category | Cases | |
|---|---|---|---|
| 0 | 3191 | 
                                    
                                    95.8%
                                 | |
| 1 | 62 | 
                                    
                                    1.9%
                                 | |
| 2 | 32 | 
                                    
                                    1%
                                 | |
| 3 | 19 | 
                                    
                                    0.6%
                                 | |
| 4 | 6 | 
                                    
                                    0.2%
                                 | |
| 5 | 3 | 
                                    
                                    0.1%
                                 | |
| 6 | 1 | 
                                    
                                    0%
                                 | |
| 7 | 17 | 
                                    
                                    0.5%
                                 | |
| Missing value | 12 |