| Value | Category | 
|---|---|
| 1 | No Formal Education | 
| 10 | Kindergarten | 
| 11 | Elementary Grade 1 | 
| 12 | Elementary Grade 2 | 
| 13 | Elementary Grade 3 | 
| 14 | Elementary Grade 4 | 
| 15 | Elementary Grade 5 | 
| 16 | Elementary Grade 6 | 
| 17 | Elementary Grade 7 | 
| 19 | Elementary Grade not specified | 
| 20 | Secondary Grade 1 | 
| 21 | Secondary Grade 1 | 
| 22 | Secondary Grade 2 | 
| 23 | Secondary Grade 3 | 
| 24 | Secondary Grade 4 | 
| 25 | Secondary Grade 5 | 
| 26 | Secondary Grade 6 | 
| 29 | Secondary Grade not specified | 
| 31 | University, 1st year | 
| 32 | University, 2nd year | 
| 33 | University, 3rd year | 
| 34 | University, 4th year | 
| 35 | University, 5th year | 
| 36 | University, 6th year | 
| 37 | Bachelor's Degree | 
| 38 | Higher than Bachelor's Degree | 
| 39 | University Level not specified | 
| 40 | Lower Vocational | 
| 50 | Upper Vocational | 
| 60 | High Vocational | 
| 61 | Teacher Training | 
| 62 | Technical and Advanced Vocational | 
| 90 | Other Education | 
| 99 | Unknown or Not Reported |