| Value | Category | Cases | |
|---|---|---|---|
| 0 | 184 | 
                                    
                                    91.1%
                                 | |
| 1 | 12 | 
                                    
                                    5.9%
                                 | |
| 2 | 1 | 
                                    
                                    0.5%
                                 | |
| 12 | 1 | 
                                    
                                    0.5%
                                 | |
| 98 | Don't know | 1 | 
                                    
                                    0.5%
                                 | 
| a | 3 | 
                                    
                                    1.5%
                                 | |
| Sysmiss | 3 |