| Value | Category | Cases | |
|---|---|---|---|
| 0 | 151 | 
                                    
                                    4.5%
                                 | |
| 1 | 22 | 
                                    
                                    0.7%
                                 | |
| 2 | 33 | 
                                    
                                    1%
                                 | |
| 3 | 53 | 
                                    
                                    1.6%
                                 | |
| 4 | 88 | 
                                    
                                    2.6%
                                 | |
| 5 | 121 | 
                                    
                                    3.6%
                                 | |
| 6 | 261 | 
                                    
                                    7.8%
                                 | |
| 7 | 2598 | 
                                    
                                    78.1%
                                 | |
| Missing value | 16 |