| Value | Category | Cases | |
|---|---|---|---|
| 0 | 566 | 
                                                                 
                                    
                                    90.6%
                                 
                                                             | 
                                                        
                    |
| 1 | 59 | 
                                                                 
                                    
                                    9.4%
                                 
                                                             | 
                                                        
                    |
| -99 | 4 | ||
| Sysmiss | 28 |