| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 | 390 | 
                                    
                                    84.1%
                                 | 
| 2 | 0 | 61 | 
                                    
                                    13.1%
                                 | 
| 3 | Don't know | 13 | 
                                    
                                    2.8%
                                 | 
| Sysmiss | 401 |