| Value | Category | Cases | |
|---|---|---|---|
| 0 | None | 1 | 
                                    
                                    0.1%
                                 | 
| 1 | 1 yr of primary | 0 | 
                                    
                                    0%
                                 | 
| 2 | 2 yr or primary | 0 | 
                                    
                                    0%
                                 | 
| 3 | 3 yr of primary | 0 | 
                                    
                                    0%
                                 | 
| 4 | 4 yr of primary | 1 | 
                                    
                                    0.1%
                                 | 
| 5 | 5 yr or primary | 0 | 
                                    
                                    0%
                                 | 
| 6 | 6 yr of primary | 1 | 
                                    
                                    0.1%
                                 | 
| 7 | 1 yr of secondary | 1 | 
                                    
                                    0.1%
                                 | 
| 8 | 2 yr of secondary | 1 | 
                                    
                                    0.1%
                                 | 
| 9 | 3 yr of seconday | 1 | 
                                    
                                    0.1%
                                 | 
| 10 | 4 yr of secondary | 1 | 
                                    
                                    0.1%
                                 | 
| 11 | 5 yr of secondary | 2 | 
                                    
                                    0.2%
                                 | 
| 12 | 6 yr of secondary | 316 | 
                                    
                                    24%
                                 | 
| 13 | College | 985 | 
                                    
                                    74.7%
                                 | 
| 96 | Other | 8 | 
                                    
                                    0.6%
                                 | 
| Sysmiss | RF | 0 | |
| Sysmiss | DK | 0 | |
| Sysmiss | 22 |