| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 18 | 
                                    
                                    3.7%
                                 | 
| 2 | No | 408 | 
                                    
                                    83.1%
                                 | 
| 99 | Don't know | 65 | 
                                    
                                    13.2%
                                 | 
| Sysmiss | 321 |