| Value | Category | Cases | |
|---|---|---|---|
| 0 | 591 | 
                                    
                                    17.6%
                                 | |
| 1 | 2657 | 
                                    
                                    78.9%
                                 | |
| 2 | 113 | 
                                    
                                    3.4%
                                 | |
| 3 | 6 | 
                                    
                                    0.2%
                                 | |
| Sysmiss | 7483 |