| Value | Category | Cases | |
|---|---|---|---|
| 0 | Not given | 1288 | 
                                                                 
                                    
                                    16.6%
                                 
                                                             | 
                                                        
                    
| 2001 | 199 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    |
| 2002 | 1036 | 
                                                                 
                                    
                                    13.4%
                                 
                                                             | 
                                                        
                    |
| 2003 | 1118 | 
                                                                 
                                    
                                    14.4%
                                 
                                                             | 
                                                        
                    |
| 2004 | 1164 | 
                                                                 
                                    
                                    15%
                                 
                                                             | 
                                                        
                    |
| 2005 | 1327 | 
                                                                 
                                    
                                    17.1%
                                 
                                                             | 
                                                        
                    |
| 2006 | 1258 | 
                                                                 
                                    
                                    16.3%
                                 
                                                             | 
                                                        
                    |
| 2007 | 308 | 
                                                                 
                                    
                                    4%
                                 
                                                             | 
                                                        
                    |
| 4444 | Marked on card | 35 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 6666 | Mother reported | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9997 | Inconsistent | 8 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    
| 9998 | DK | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 9999 | Missing | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 1054 |