| Value | Category | Cases | |
|---|---|---|---|
| -999 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -888 | Not available | 10 | 
                                    
                                    0.5%
                                 | 
| 1 | Yes | 479 | 
                                    
                                    24.5%
                                 | 
| 2 | No | 1466 | 
                                    
                                    75%
                                 |