| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 1128 | 
                                                                 
                                    
                                    80.2%
                                 
                                                             | 
                                                        
                    
| 2011 | 1 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 2012 | 36 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    |
| 2013 | 28 | 
                                                                 
                                    
                                    2%
                                 
                                                             | 
                                                        
                    |
| 2014 | 206 | 
                                                                 
                                    
                                    14.7%
                                 
                                                             | 
                                                        
                    |
| 4444 | Marked on card | 2 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 6666 | Mother reported | 5 | 
                                                                 
                                    
                                    0.4%
                                 
                                                             | 
                                                        
                    
| 9997 | Inconsistent | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9998 | DK | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9999 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1322 |