| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 17 | 
                                    
                                    3.3%
                                 | 
| 2 | No | 477 | 
                                    
                                    93.5%
                                 | 
| 99 | Don't know | 16 | 
                                    
                                    3.1%
                                 | 
| Sysmiss | 291 |