| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 | 399 | 
                                    
                                    86%
                                 | 
| 2 | 0 | 51 | 
                                    
                                    11%
                                 | 
| 3 | Don't know | 14 | 
                                    
                                    3%
                                 | 
| Sysmiss | 401 |