| Value |
Category |
| 0 |
No edcuation |
| 1 |
Pre-school |
| 2 |
Primary |
| 3 |
Secondary |
| 4 |
Normal / police / military |
| 5 |
Advanced university |
| 6 |
Postgraduate university |
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.