| Value | Category | Cases | |
|---|---|---|---|
| 0 | no prior child | 3928 | 
                                                                 
                                    
                                    47.7%
                                 
                                                             | 
                                                        
                    
| 2 | 2362 | 
                                                                 
                                    
                                    28.7%
                                 
                                                             | 
                                                        
                    |
| 3 | 1496 | 
                                                                 
                                    
                                    18.2%
                                 
                                                             | 
                                                        
                    |
| 4 | 393 | 
                                                                 
                                    
                                    4.8%
                                 
                                                             | 
                                                        
                    |
| 5 | 49 | 
                                                                 
                                    
                                    0.6%
                                 
                                                             | 
                                                        
                    |
| 6 | 4 | 
                                                                 
                                    
                                    0%
                                 
                                                             |