| Value | Category | Cases | |
|---|---|---|---|
| 0 | not given | 93 | 
                                    
                                    4.5%
                                 | 
| 1 | 224 | 
                                    
                                    10.9%
                                 | |
| 2 | 205 | 
                                    
                                    10%
                                 | |
| 3 | 179 | 
                                    
                                    8.7%
                                 | |
| 4 | 115 | 
                                    
                                    5.6%
                                 | |
| 5 | 182 | 
                                    
                                    8.9%
                                 | |
| 6 | 124 | 
                                    
                                    6.1%
                                 | |
| 7 | 111 | 
                                    
                                    5.4%
                                 | |
| 8 | 123 | 
                                    
                                    6%
                                 | |
| 9 | 112 | 
                                    
                                    5.5%
                                 | |
| 10 | 152 | 
                                    
                                    7.4%
                                 | |
| 11 | 147 | 
                                    
                                    7.2%
                                 | |
| 12 | 176 | 
                                    
                                    8.6%
                                 | |
| 44 | marked on card | 76 | 
                                    
                                    3.7%
                                 | 
| 66 | mother reported | 27 | 
                                    
                                    1.3%
                                 | 
| 97 | inconsistent | 0 | 
                                    
                                    0%
                                 | 
| 98 | dk | 0 | 
                                    
                                    0%
                                 | 
| 99 | missing | 1 | 
                                    
                                    0%
                                 | 
| Sysmiss | 13304 |