| Value | Category | Cases | |
|---|---|---|---|
| 0 | 17 | 
                                    
                                    23.9%
                                 | |
| 1 | 10 | 
                                    
                                    14.1%
                                 | |
| 2 | 2 | 
                                    
                                    2.8%
                                 | |
| 3 | 1 | 
                                    
                                    1.4%
                                 | |
| Missing value | 41 | 
                                    
                                    57.7%
                                 |