| Value | Category | Cases | |
|---|---|---|---|
| 0 | no anc | 51 | 
                            
                             
                                
                                8.5%
                                                             
                            
                         | 
                        
                    
| 1 | <4 | 152 | 
                            
                             
                                
                                25.4%
                                                             
                            
                         | 
                        
                    
| 2 | 4+ | 396 | 
                            
                             
                                
                                66.1%
                                                             
                            
                         | 
                        
                    
| 3 | don't know/missing | 0 | 
                            
                             
                                
                                0%
                                                             
                            
                         |