| Value | Category | Cases | |
|---|---|---|---|
| 0 | 594 | 
                                                                 
                                    
                                    97.4%
                                 
                                                             | 
                                                        
                    |
| 1 | 16 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    |
| -99 | 11 | ||
| Sysmiss | 36 |