| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0 | 0 | 
                                    
                                    0%
                                 | 
| 1 | Used | 1258 | 
                                    
                                    24.6%
                                 | 
| 2 | Not used | 3850 | 
                                    
                                    75.4%
                                 | 
| Sysmiss | 4 |