| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 1 | 
                                    
                                    0.2%
                                 | 
| 1 | Yes | 481 | 
                                    
                                    78.2%
                                 | 
| 2 | No | 133 | 
                                    
                                    21.6%
                                 | 
| Sysmiss | 1520 |