| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 108 | 
                                    
                                    15.4%
                                 | 
| 1 | 1 | 259 | 
                                    
                                    36.9%
                                 | 
| 2 | 2 | 204 | 
                                    
                                    29.1%
                                 | 
| 3 | 3 | 97 | 
                                    
                                    13.8%
                                 | 
| 4 | 4 | 34 | 
                                    
                                    4.8%
                                 | 
| Sysmiss | 2939 |