| Value | Category | Cases | |
|---|---|---|---|
| 0 | First birth | 18239 | 
                                                                 
                                    
                                    27.6%
                                 
                                                             | 
                                                        
                    
| 1 | <2 years | 19394 | 
                                                                 
                                    
                                    29.3%
                                 
                                                             | 
                                                        
                    
| 2 | 2 years | 14676 | 
                                                                 
                                    
                                    22.2%
                                 
                                                             | 
                                                        
                    
| 3 | 3 years | 6430 | 
                                                                 
                                    
                                    9.7%
                                 
                                                             | 
                                                        
                    
| 4 | 4+ years | 7341 | 
                                                                 
                                    
                                    11.1%
                                 
                                                             |