| Value | Category | Cases | |
|---|---|---|---|
| 0 | 193 | 
                                    
                                    5.8%
                                 | |
| 1 | 36 | 
                                    
                                    1.1%
                                 | |
| 2 | 87 | 
                                    
                                    2.6%
                                 | |
| 3 | 178 | 
                                    
                                    5.3%
                                 | |
| 4 | 256 | 
                                    
                                    7.7%
                                 | |
| 5 | 302 | 
                                    
                                    9.1%
                                 | |
| 6 | 307 | 
                                    
                                    9.2%
                                 | |
| 7 | 1970 | 
                                    
                                    59.2%
                                 | |
| Missing value | 14 |