| Value | Category | Cases | |
|---|---|---|---|
| 0 | not given | 406 | 
                                    
                                    84.8%
                                 | 
| 9 | 1 | 
                                    
                                    0.2%
                                 | |
| 10 | 1 | 
                                    
                                    0.2%
                                 | |
| 15 | 1 | 
                                    
                                    0.2%
                                 | |
| 19 | 1 | 
                                    
                                    0.2%
                                 | |
| 21 | 1 | 
                                    
                                    0.2%
                                 | |
| 24 | 1 | 
                                    
                                    0.2%
                                 | |
| 44 | marked on card | 30 | 
                                    
                                    6.3%
                                 | 
| 66 | mother reported | 37 | 
                                    
                                    7.7%
                                 | 
| 97 | inconsistent | 0 | 
                                    
                                    0%
                                 | 
| 98 | dk | 0 | 
                                    
                                    0%
                                 | 
| 99 | missing | 0 | 
                                    
                                    0%
                                 | 
| Sysmiss | 14872 |