| Value | Category | Cases | |
|---|---|---|---|
| 1 | Father =1 and Mother =1 | 11744 | 
                                    
                                    50.1%
                                 | 
| 2 | Father =1 and Mother =2 | 2786 | 
                                    
                                    11.9%
                                 | 
| 3 | Father =2 and Mother =1 | 2060 | 
                                    
                                    8.8%
                                 | 
| 4 | Father =2 and Mother =2 | 6870 | 
                                    
                                    29.3%
                                 | 
| Sysmiss | 1467 |