| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 23 | 
                                    
                                    3.3%
                                 | 
| 1 | 1 | 135 | 
                                    
                                    19.5%
                                 | 
| 2 | 2 | 224 | 
                                    
                                    32.3%
                                 | 
| 3 | 3 | 224 | 
                                    
                                    32.3%
                                 | 
| 4 | 4 | 87 | 
                                    
                                    12.6%
                                 | 
| Sysmiss | 2948 |