| Value | Category | Cases | |
|---|---|---|---|
| 0 | no: some assistance | 1617 | 
                                                                 
                                    
                                    99.1%
                                 
                                                             | 
                                                        
                    
| 1 | yes: no assistance | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 9 | 13 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 11 | .Z | 17122 |